Kagero: Deception 2 (PS1)

Cross-Series (Monster Rancher): If you get all four endings of the game saved on one file, you get to use Suezo, the yellow eyeball monster from the Monster Rancher games, as a trap.
Status: TRUE: (Screenshot) proves it.

Ken Griffey Jr. Presents Major League Baseball (SNES)

Music (Joe Satriani): The end credits theme is Joe Satriani's "Speed of Light". (Credit: Kairobi King)
Status: TRUE: Verified by FO. It should also be noted that "Speed of Light" was used in the Super Mario Bros. movie.

Kickle Cubicle (NES)

Cross-Series (Kid Niki: Radical Ninja): There's a code to make Kid Niki: Radical Ninja appear on the title screen.
Status: TRUE: (Screenshot) proves it.

Kid Dracula (GB)

Cross-Series (Castlevania 3: Dracula's Curse): The first level's music is a really freaky version of "Beginning" (the first level music) of Castlevania 3. (Credit: Sedgewick)
Status: TRUE: Verified by FO. Midis for comparison: (Kid Dracula Midi) (Castlevania 3 Midi)

Music (Debussy): The second level's music is "Golliwogg's Cakewalk" by Claude Debussy. (Credit: Sedgewick)
Status: TRUE: Verified by FO. (Golliwogg's Cakewalk Midi)

Literature (A Christmas Carol): The first set of bosses are based on the ghosts of Christmas Past, Present, and Future from Charles Dickens's classic novel, "A Christmas Carol". However, in this game, they are the ghosts of Halloween instead of Christmas. (Credit: Sedgewick)
Status: TRUE: Verified by FO. It actually only says this in the manual, but that counts.

Cross-Series (Gargoyle's Quest): This game seems as though it was meant as a parody of not only Konami's Castlevania series, but other game series as well (particularly famous platformers), some of which aren't even made by Konami. Normally, I wouldn't think seeing one or two things in a game that look similar to something in another was anything special, but there are too many things here for this all to be coincidence. Here is everything I could find: First of all, the title screen looks like it could be a spoof of the Gargoyle's Quest's series title screens. (Screenshot)
Status: Unproven: I'm not 100% sure about this one. Could just be coincidence.

Cross-Series (Castlevania): The first level is full of Castlevania references. Kid Dracula starts in a room with his coffin (Screenshot). The first part of this stage has those mashing spiked blocks that drop up and down from the ceiling, first seen in Castlevania 1 (Screenshot). The second part is a clock tower, a la, Castlevania 3 (Screenshot). The third part has those tipsy platforms from the Ghost Ship in Castlevania 3 (Screenshot). Enemies like the bats, knights, and Frankenstein monster (Screenshot) are all common Castlevania enemies. The chamber leading up to the boss is similar to the chambers leading to Dracula in most of the Castlevania games. You move from right to left and there's a crescent moon outside, only, since Kid Dracula is a "super-deformed" game, this moon has a face and it's snoring. (Screenshot) The inside of the ship also has those floors that rotate when you jump on them, first seen in Castlevania 3 (Screenshot).
Status: TRUE: Verified by FO. Screenshots prove it.

Movie (Friday the 13th): The boss of level 2 is a spoof of Jason Voorhees. But it could also be a nod to Splatterhouse, for one simple reason: Jason Voorhees never used a shotgun. (Screenshot) (Credit: Dire 51 & Flying Omelette)
Status: TRUE: Whether or not this boss is a spoof of Rick from Splatterhouse, they both have their "roots" in Jason.

Cross-Series (Mega Man): There is much evidence of this game being a Mega Man parody. In Level 3, the clouds with the faces on them (Screenshot) look like something out of a Mega Man game. In Level 7, the robot enemies with the drills (Screenshot) more than casually resemble Mega Man 4's Drill Man. Likewise, the boss of Level 7 is a take on the Rock Monster boss from Mega Man 1 and 3. The ending also seems like a spoof of Mega Man. In the ending sequence, Kid Dracula walks home as the credits are being shown. When he arrives home, his Grim Reaper friend runs out to meet him, and everyone freezes in place. That happens with Dr. Light and Roll in Mega Man 1 and 4.
Status: Coincidence?: Usually, when one game rips off something from another game, I try not to include such things on the Cameos Database, but when it's an intentional parody, as I believe this is, then that's a slightly different situation.

Cross-Series (Super Mario Bros. 3/Super Ghouls n Ghosts): The first part of level 4 seems definitely inspired by the airships of Super Mario Bros. 3. They're flying wooden ships with cannons on the side that fire cannonballs diagonally. The reaper enemies in this level act a lot like the Red Arima enemies from the Ghosts n Goblins games. Even though this level was more or less inspired by SMB3, it's also somewhat reminiscent of the sinking ship level in Super Ghouls n Ghosts. (Screenshot)
Status: Coincidence?: I guess I can't prove beyond a shadow of a doubt that these homages were intentional, but I really do believe they are. There are just too many things here.

Cross-Series (Donkey Kong): Once inside the ship, there are falling barrels, a la Donkey Kong. (Screenshot)
Status: Coincidence?: Too bad there's no big gorilla dropping them.

Cross-Series (Goemon): When you beat the fake Garamoth boss, it drops a HUGE coin. There is an Ebisumaru face on the coin! Ebisumaru is from Goemon/Mystical Ninja, of course. (This is my personal favorite cameo in the game.)
Status: TRUE: (Screenshot) proves it.

TV Shows (Batman): The pre-level cinema scene shows Kid Dracula at a computer monitor that has a bat on top of it. Might be a spoof of Batman's infamous Bat Computer.
Status: Unproven: I'm not 100% sure it's an actual pun, but it's still worth noting.

Cross-Series (Life Force): The first part of level 6 has those infamous flares from Life Force's prominence stage (level 3).
Status: TRUE: (Screenshot) proves it.

Cross-Series (Gradius): The second part of level 6 has the rock-spewing volcanoes from the Gradius games.
Status: TRUE: (Screenshot) proves it.

Cross-Series (Gradius): I think the boss of this stage (as well as the smaller stage enemies it's based on) may also be from a Gradius game, but I'm not sure. I've seen something similar to it in Gradius Galaxies. It looks like a fiery dog or lion, if that helps. (Screenshot)
Status: Unverified

Movie (Alien): The aliens from the final part look like H.R. Giger's Alien (Screenshot). These aliens might also be a possible homage to Contra, which uses a lot of Giger-inspired aliens for enemies. Garamoth, himself, has an elongated Alien head (Screenshot).
Status: TRUE: Screenshots prove it.

Cross-Series (Gradius 3): The floors and ceilings that close in on you may also be a Gradius reference. They're very similar to the ones in the mechanical base level of Gradius 3.
Status: TRUE: Verified by FO.

Famous Person (Bela Lugosi): The manual calls the umbrella powerup, "Umbrella Lugosi", named after the famous actor who played the role of "Dracula" in the original movie.
Status: TRUE: Verified by FO.

Famous Person (Phyllis Diller): The manual calls the drill enemies of the final stage, "Phyllis Driller", named after the singer Phyllis Diller.
Status: TRUE: Verified by FO.

Kid Icarus (NES)

Cross-Series (Metroid): The Komayto enemies look like Metroids.
Status: TRUE: (Screenshot) proves it, and the manual specifically implies that it's true.

Mythology (Greek/Roman): The name "Icarus", of course, comes from the myth about a boy who made wings out of feathers and wax and flew too close to the sun. "Medusa" was one of the three gorgon sisters whose looks could turn a man to stone. The boss "Pandora" is named after the woman in "Pandora's Box", who opened the box and unleashed all the evils upon mankind. The first boss is a two-headed dog that guards the Underworld Fortress, sort of like the Cerberus that guarded the entrance to Hades. The Syren is named after the sirens that would sing and lure sailors to their doom. The Uranos and Pluton enemies are named after Roman gods, Uranus and Pluto. Finally, Zeus is the main "god" of Greek myth.
Status: TRUE: Verified by FO.

Famous Person (Mick Jagger): Here's one that's been sitting right under my nose for so very long, and I only just recently spotted it. This enemy (picture) is a giant pair of lips named "Mick". Gee, couldn't possibly be named after Mick Jagger, now could it?
Status: Coincidence?: Someone at Nintendo has a strange sense of humor.

Kid Icarus: Of Myths and Monsters (GB)

Cross-Series (Metroid): The Metroid-like Komaytos are also in this game, but they look slightly different. I wonder if the change was made to coincide with the mutated Metroids of Metroid 2: Return of Samus, released around the same time as this game.
Status: TRUE: Verified by FO.

Killer Instinct (Multiplatform)

Cross-Series (Street Fighter 2): Eyedol's ending is a direct spoof of Blanka's ending in Street Fighter 2. ("Are you my long-lost son Billy?", etc.) (Credit: Kairobi King)
Status: TRUE: Verified by FO.

Cross-Series (Saber Wulf): Sabrewulf is from an old Commodore 64 game called Saber Wulf that was made by Ultimate. It involved a hunter trying to catch a big blue wolf. (Ultimate later became Rare.) Incidentally, this game was recently updated and released for the Game Boy Advance. (Credit: Kairobi King)
Status: TRUE: Verified by FO.

King Kong 2: Ikari no Megaton Punch (Multiplatform)

Cross-Series (Wai Wai World): Sometimes, Konami Man will fly by as a power-up. When you pick up the hidden Konami flag symbol, he appears, and if you pick him up, he gives full health. (Credit: Arnold & Dire 51)
Status: TRUE: OPCFG confirms it.

King of Fighters 95 (Multiplatform)

Literature (The BFG): Iori has a move called "Maiden Masher" which is a reference to one of the giants in the book entitled "The BFG". (Credit: Lord DR)
Status: Unverified

King's Quest 3: To Heir is Human (PC)

Literature (Goldilocks and the Three Bears): In King's Quest 3, you can find the three bears from "Goldilocks and the Three Bears". (Credit: ShadOtterdan)
Status: Unverified

Kirby: Nightmare in Dream Land (GBA)

Cross-Series (The Legend of Zelda): Sword power gives Kirby Link's hat and the Master Sword from the Legend of Zelda series. (Credit: Mark Kelly)
Status: Unverified

Cross-Series (Ice Climber): Freeze power gives Kirby Popo's blue parka from Ice Climber. (Credit: Mark Kelly)
Status: Unverified

Kirby's Adventure (NES)

Specific Reference: The final level of Kirby's Adventure before the last boss is directly based on Kirby's Dream Land for Game Boy. The level is entirely black and white, the four areas are based on the Game Boy game's four levels, and the music is exactly the same as the Kirby's Dream Land Level 1 theme.
Status: TRUE: (Screenshot) proves it.

Programmers: In level 1-2, there is a way to find a secret block formation that reads "HAL", the company that made the game.
Status: TRUE: (Screenshot) proves it.

Kirby's Avalanche (SNES)

Cross-Series (The Adventures of Lolo): Lolo and Lala from the Adventures of Lolo series are one of the opponents in the one-player mode. (Credit: James FP)
Status: TRUE: Verified by FO.

Cross-Series (Puyo Puyo): This game is the Super NES version of a Famicom game called "Puyo Puyo". Therefore, the "bean"-like creatures you make disappear are from Puyo Puyo.
Status: TRUE: Verified by FO.

Kirby's Dream Land (GB)

Cross-Series (The Adventures of Lolo): Lolo and Lala from the Adventures of Lolo series are the bosses of Level 2. They even push blocks to attack you. Note that the Kirby series of games calls them Lololo and Lalala.
Status: TRUE: Verified by FO.

Kirby's Dream Land 3 (SNES)

Cross-Series (Metroid): In one level, Samus Aran is waiting at the end. If you find and destroy some Metroids in the level, she'll remove her helmet and give you the secret star for that stage.
Status: TRUE: Screenshots prove it: (Metroid Screenshot) (Samus Screenshot)

Cross-Series (R.O.B.): In Sand Canyon Level 6, collect the pieces to R.O.B. the Robot and professor Hector will assemble him at the end. R.O.B. was an NES peripheral, and Hector was the character in both R.O.B. games, Gyromite and Stack Up. (Credit: Mark Kelly & Flying Omelette)
Status: TRUE: (Screenshot) proves it.

Cross-Series (HyperZone): The final area is called the "Hyper Zone", which is a reference to HAL's early SNES shooter game, HyperZone. This game also has levels named "Ripple Field" and "Grass Land", which were also level names in HyperZone.
Status: TRUE: (Screenshot) proves it.

Cross-Series (Yuu Yuu Ki): In Grassland Level 4, find Goku and return him to Chamu at the end of the level. They are from Yuu Yuu Ki (Famicom Disk System adventure game). (Credit: Mark Kelly)
Status: TRUE: (Screenshot) proves it.

Cross-Series (Shin Oni Ga Shima): In Sand Canyon Level 4, find Donbe and bring him to Hikari at the end of the level. They are from Shin Oni Ga Shima (Famicom Disk System adventure game remade on the Super Famicom). (Credit Mark Kelly)
Status: TRUE: (Screenshot) proves it.

Kirby Super Star (SNES)

Cross-Series (Various): During the treasure hunt game, you can find several treasures from different games, such as Mr. Saturn from EarthBound, the Triforce from the Zelda series, Captain Falcon's helmet from F-Zero, a Koopa shell, Donkey Kong's Barrel, the Screw Attack from the Metroid games, the Bucket from the Super Famicom game Mario & Wario, a tire from Super Mario Kart, the Pegasus Wing from Kid Icarus, and Marth's Falchion sword and Mithril Armor from the original Fire Emblem. (Credit: Bomberguy221, Yashiro Nanakase, Mark Kelly, & bleusilence)
Status: TRUE: Pictures prove it.

Cross-Series (Super Mario Bros.): When fighting King Dedede, there are some Super Mario Bros. characters in the audience, including Mario, Luigi, Toad, and Birdo.
Status: TRUE: Verified by FO.

Cross-Series (Super Mario Bros./Metroid): When Kirby becomes Stone Kirby, he sometimes becomes a Golden Mario Statue. Sometimes, he even becomes a statue of Samus. (Credit: Deven711)
Status: TRUE: Verified by Fenrir X. (Samus Statue Sprite)

Cross-Series (The Adventures of Lolo): In the Spring Breeze game, you have to fight against Lolo and Lala from the Adventures of Lolo series, also by HAL. Since Spring Breeze is based on the original Kirby's Dream Land game for Game Boy, this makes sense, as Lolo and Lala, as Lololo and Lalala, were the bosses of Level 2 in that game. (Credit: Ruudos)
Status: TRUE: Verified by FO.

Cross-Series (The Legend of Zelda): When you get the Sword weapon, Kirby's green hat is a reference to Link. His sword even looks like the Master Sword. (Credit: Mark Kelly)
Status: Unverified

Movie/Mythology (Various): More treasure hunt items include Indiana Jones's whip, Cinderella's glass slipper, Bruce Lee's nunchaku, King Tutankhaman's mask, and the Tanuki. And this one, called Bamboo Cutter's Daughter, is based on a Japanese legend. (Credit: Fenrir X)
Status: TRUE: Pictures prove it.

Specific Reference: The Spring Breeze game is a shortened version of the Game Boy Kirby's Dream Land, minus the second level and the third boss. Even the ending is the same. (Credit: bleusilence & Andrew Rae)
Status: TRUE: Verified by FO.

Music: The main theme to the Great Cave Offensive is a slowed down version of "Green Greens" from Kirby's Dream Land. And the save music (in all of the games) is a slowed down version of "Float Islands". (Credit: Andy Thorley)
Status: Unverified

Note: All images in this section provided by Fenrir X.

Klonoa: The Door to Phantomile (PS1)

Cross-Series (Pac-Man): Klonoa's hat has a Pac-Man symbol on it. (Credit: Michael Morissette)
Status: TRUE: Verified by FO.

Knuckles Chaotix (Sega 32X)

Character Cameo: Sonic and Tails appear in the ending when you get all six Chaos Rings. Tails is directly below Sonic, riding an airplane, a la Sonic the Hedgehog 2 (Credit: Michael Morissette)
Status: TRUE: (www.vgmuseum.com) confirms it.

Cross-Series (NiGHTS): The building in the background of the title screen is the same building from NiGHTS into Dreams. You can even see Nights flying around in the opening sequence. (Credit: Andy Thorley)
Status: Unverified

Koudelka (PS1)

Movie (The Exorcist): This game contains a scene that clearly rips off The Exorcist. It involves a demon possessing and talking through Koudelka. Also, Elaine does the spider-walk thing from that deleted scene.
Status: TRUE: Verified by FO.

Movie (Titanic): Another scene in this game is based on the tragedy of the Titanic. The crazy captain who lives around the monastery was responsible for the sinking of a famous ocean liner. An FMV sequence shows what happened.
Status: TRUE: Verified by FO.

Famous Person (Jack the Ripper): It's quite thoroughly implied that Patrick, the main "villain", was Jack the Ripper.
Status: TRUE: Verified by FO.

Real Place (Tower of London): The monastery itself is based on the infamous Tower of London. There are many "ghost stories" surrounding the Tower of London, and some of the bosses in this game are based on them. One in particular is a pair of twin boys who are dressed in night gowns and always holding hands. Supposedly, this is one of the many "ghosts" people claimed to have seen in the Tower.
Status: TRUE: Verified by FO.

Kung Fu (NES)

Movie (Spartan X): The Japanese name of this game is Spartan X, and is based on a Jackie Chan film (Wheels on Meals in the U.S.) Thomas and Sylvia are characters in the film as they are in the game. (Credit: Mark Kelly)
Status: TRUE: Verified by FO. Source: Nintendo Database.

Kunio Tachi no Banka (SFC)

Cross-Series (The Combatribes): There is an advertisement for the Combatribes in the background of one of the stages. (Credit: Yashiro Nanakase)
Status: Unverified