Kirby

Character Basics
Kirby is the titular pink puff and main protagonist of Nintendo's Kirby series of video games. The series has been running for over two decades, and over thirty titles have been released under Kirby's name, most of which are developed by HAL Laboratory, Inc. or published by HAL for co-developing studios. Kirby cannot speak properly but he can vocalise, he primarily says 'Poyo' when trying to communicate.

In Super Smash Bros
Kirby was introduced in the original Smash bros, while not the best tier wise Kirby is still used a lot.

In Super Smash: Bloxxed.
Kirby is unique in that he can copy the abilities of any fighter that he absorbs. He is the only character who can do this.