Butterfree Solo http://goo.gl/d70xz
Well, before Gen 4, I didn't really like Hitmonchan because while his elemental punches were cool and all, they were all special based. And Hitmonchan's special attack stat = rubbish. But now that that's been fixed, I like Hitmonchan more ^-^
Hitmonlee is better in-game, that extra speed helps a bit, plus limber is a cool ability, don't have to worry about dumb para hax.