The Caterpillar

The Caterpillar is an exclusive character that appears as a cameo in the Kingdom Hearts 358/2 Days manga adaptation.

Kingdom Hearts 358/2 Days
While traveling throughout Wonderland with Luxord, Roxas encounters the Caterpillar while wandering throughout a garden. He gives advice to Roxas that "one side will make u grow taller, and one side will make u grow shorter", referring to the mushroom that Roxas is sitting on. When asked what side is which, the caterpillar turns into a butterfly and flies away.

Kingdom Hearts V CAST
The Caterpillar appears within Wonderland and can be made to talk or activate special effects by giving Potions, similar to the Flowers from the main games.

Origin
The Caterpillar first appeared in the 1865 novel, which was later adapted by Disney into the animated film,.