Chrono Trigger Character Library

This demo (along with the Jet Bike and Music Library demos) was released on the Bandai Satellaview addon for the Super Famicom. It lists many of the enemies from the final game, as well as the main characters. You can scroll through most of their frames of animation.

Lost Monsters

Golden Frog
A so-called lost monster. It was used in an event.
Jaribouzu
A so-called lost monster. Appeared in an ending.

'Golden Frog' is of course the Frog King. Jaribouzu (would be translated as something like Kid Imp using Woolsey's style) appears in the programmer's ending.

Translation

My dump of the game's text and its translation can be found here.