Who are some good secondaries for Mewtwo?

[TheException]

I've been struggling against small characters, Cloud, and Diddy. I've been trying a bunch of random characters for them like Metaknight and Fox but can't seem to find what would be a good combination to deal with these characters.

Edit: Oops thought I was in the MewTwo section

 

[Wintermelon43]

Mega Man. He beats both Diddy and Cloud.

 

[MarioManTAW]

Mega Man. He beats both Diddy and Cloud.

Of course, that's assuming you have time to learn Mega Man while still keeping Mewtwo fresh, as both are difficult characters to master.

 

[Mordecai Hazard]

Oh, I highly suggest MegaMan. No one can get through them lemons :V