If you use the bucket to visit Lavos we can see the now familiar bubbly background. In this case, however, it is orange rather than blue. I'm not sure why this is, since the time gate is blue, just like all the other ones.

When fighting Lavos we can see that the game uses one layer for its shell and one layer for its eye. This is also true for the Lavos spawn enemies.

Once we enter Lavos' shell we find an oddity: there is no sign of the bubbly background anywhere. This is peculiar, because this is the only screen where there is a time gate, but no sign of the bubbles. As to why this is, I'm afraid I just don't know.

I mentioned this bit before, but I'm going to show it again because this it makes me laugh. Removing the bed sprites reveals Crono's hair, quivering in midair.

   

If we return to Leene Square we can see the steps were originally intended to go much farther than they do in the final version of the game. As before, the hidden sprites are in the left image, the right image is untouched.

In the ending where Frog marries into the royal family we can see a blue pattern hidden in the throne room. Perhaps the King installed a pool to cope with his amphibious heritage.

Then, a little further on in the same ending, we can see a few shadows in the screening room. We can see Lucca, Marle and Crono as well as the base of the throne, appearing as they do when the scene fades to black.

In the ending where Frog visits Magus' shrine we can see a Spekkio doll hidden under the shrine itself. I have to wonder why it's even here, since this part of the game isn't even remotely playable.

And that, dear reader, concludes this incredibly brisk walkthrough of Chrono Trigger showcasing the hidden materials. There are many endings aside from the ones I mentioned, but I have omitted them since they either do not contain hidden materials or are copies of the endings I have already documented.

The only thing that remains now is to say thank you for reading, and I hope you enjoyed taking a look at all of the hidden stuff.

Goodbye!