Here's the other three characters.

Ezark is a very aggressive prey pokemon. He just loves being in bellies. He'll force his way into one if he feels like it. He tends to get a little jealous if he's with other prey and they get eaten he'll complain about why he wasn't eaten. He tends to hang around gluttons with huge appetites so that he could enjoy the comfy belly.

Mizio is a drowzee who tries to find ways to speed up his evolution to becoming a hypno. However he gets distracted by his goals. With his psychic powers he's able to lift up opponents ten times his weight. He's quite friendly and loves to talk about evolution and mega evolution. He also like to eat no matter where he is- even if he got eaten.

Rockwell is usually gentle. He wants to give hugs with coils but thanks to his rocky exterior most beings would be scratched up but he tries to fatten himself up to soften the rocks and it does help so he tends to eat a lot of food to make his rocks soft. He and Brako share the love of giving out hugs.