Puk-Puk

Unreleased Puk Puk is the cute mascot of Yumbobo. He is probably a person in a suit.

Physical appearance
Puk Puk is blue penguin with a white chest. He wears a purple scarf and a blue sailor's hat with a red ribbon. He also has a blue curly tail, which was not anatomically accurate according to Brain.

Trivia

 * Although Alan is right about the curly tail, penguins actually have long tails to help with the swimming.