Board Thread:General Discussion/@comment-4041418-20140315151044/@comment-4041418-20140318001355

Miraibuu wrote: Yammy is probably a Vasto Lorde. It's just that Kenpachi and Byakuya were too much for his low intelligence. Mindless power is useless power. He simply can't fight.

Yep, but Yammy still worked them over pretty badly, even if they would never admit it with Byakuya's pride and Kenpachi's stubbornness.