Columbo is the mouse that resides during the game in Shorty's front overall pocket. His dance style maches that of Shorty's. He's my favorite mascot of the game, (If you couldn't tell, I spent a couple of hours making the animated gif of him.)
If you play as shorty and complete the seven level combo (best way to describe is pulling off two of the 5 movements in a row correctly), Columbo jumps out of her pocket and starts dancing with you.
Ain't he cute?
Just gives ya diabetes, doesn't it?
A closeup of Columbo in Shorty's overalls
yeah, yeah, another Columbo
Another shot of Columbo dancing with you
Columbo dancing with you in Kitty's stage