The Shape Bandit is a grey, male cat. His outfit is mostly purple consisting of a jumpsuit, gloves, cape, mask, and shoes.
In his first early concept design, The Shape Bandit wears a speedo, and gloves and he has only one set of whiskers. In his second concept design, he almost looks the same as his final design, only he still has his one set of whiskers and has a "goatee".
The Shape Bandit is sneaky and really tricky. He carries a magic bag that unleashes a shape-stealing purple tornado. He lives in a giant pair of pants as his hideout. He does not like his current home so he tries to build a house with Geo's Shape Belt, which he stole, but doesn't have Geo's powers. Geo puts on the shapes for the walls and windows, and he lets the Shape Bandit put on the final shape: the triangle for the roof. Team Umizoomi puts the house onto an empty grass yard. However, he cannot live in his new house yet; he needs to return all the shapes he stole. He whistles for his whirlwind and then it returns all the shapes to where they are supposed to be. He then gives Geo his Shape Belt back, then he apologizes for stealing it and promises not to steal any more shapes.
The Shape Bandit also appears in Umi Grand Prix!, where he rides on his motorcycle. However, he cheated by "breaking" his promise that he'd never steal anything ever again, since he used his bag to steal the bridges to stop Team Umizoomi and Shark Car in the race. But after they passed him, his own whirlwind went out of control, carrying both him and his motorcycle in the air, then dropping him in the water, thus kicking him out of the race, as DoorMouse makes fun of him. In the end, he congratulated Umi Car and Shark Car for winning the race and beating the Troublemakers.
- "Toodely-do, Team Umizoomi" (Sometimes just "Toodely-do")
- "Uh-uh-uh! I wouldn't go any further if I were you!"
- "Oh, How do you do?" (From "Umi Grand Prix!")
- You'll never catch me, Toodely-do"
- The Shape Bandit bears some resemblance and similarity to Sylvester the Cat from Looney Tunes.
- His fur can may be a reference to Tom Cat from Tom and Jerry.
- The Shape Bandit is similar to Swiper the Fox from Dora the Explorer because they both steal stuff.
- He is similar to the Numbertaker from NumberJacks, as they prefer to steal things of one category; the Shape Bandit steals shapes while the Numbertaker steals numbers.