Flapper is a dwarf from Tontatta Kingdom who first appeared on Green Bit, when he stopped Leo from taking Robin’s clothes.

Flapper, like all the other dwarves, is small and has a large fluffy tail and a pointy nose. He has a light red polka dotted cap, a red sweater, gray pants and yellow boots.

When transformed into a toy, he became a small black bear, like all of the other dwarves who were transformed after attempting to attack Sugar. He was given a hat with vertical stripes, as well as a sword and shield.

(Source: One Piece Wiki)