Did you already try GameFAQs?
I never used Son Goku, BTW. I always picked Fuuma, Ryoko <3, and J.Max (though he was weirder here than in WH2J).
Ryoko's HERO Move was leet

60% of the enemy's bar gone after doing it (I think it is hcbx2+BC). Definitely my favorite grappler
A lot of HERO Moves were fucking weird to execute.