Super Mario Boards

Obviously Pikachu, he throws them offstage with an argument and spikes them with his d-air.

Also because he has the most varied dialogue out of them all.

Pika Pika! Piiiikachu! Pi! Kaaaa!

Pika, Pika, CHU!!! Oh, the good anime moments. When Ash was determined and serious, but not deadly serious, now, he's a guy who can't do anything without help.