Pokémon X and Pokémon Y

Right now, most of my party is on the special attacking/support/defense side. I figured replacing Venusaur would be good for coverage. Rock tomb helps with killing off bugs, ice, fire, and the occasional flying-types if it can. Upside with power-up punch is that it can still increase its attack while doing a lot of damage even after being taunted. Downside is that it gets walled more easily by ghosts. I guess I'm only afraid of it getting walled by stuff like Skarmory xD.

I have a few Shroomishes with poison heal if you want it too. IVs and natures vary, but at least one likes to thrash about.