I'm trying to breed the best Pikachu, but I dun know what the best nature would be. I know he's a SA and Speed whore, so I think I should focus somewhere else. Maybe a nature that raises defense, since Pikachu's horrible in that aspect? But then another stat would be lowered... I suppose one that lowered speed growth wouldn't be bad.
Any advice? I'll be using a Macho Brace and contracting Pokérus from another Pokémon in my PC, btw. Oh, and one last thing; his attacks will be: