This will not include Pikachu

5: Goodra

Don't kill me, but Ash didn't have Goodra for long before releasing it.

4: Noivern

I know this Pokemon could've been great if the writers were nicer to it.

3: Talonflame

This is Ash's best bird Pokemon in my opinion

2: Hawlucha

Love this Pokemon and its fighting style.

1: Greninja

Need I explain.