Wait I have to vote again? Poison! I WANT TO WATCH YOU SUF- *AHEM* I mean, I think it'd be more interesting than a monotype normal run o=D
@CrytalDragon you get a Rock type named "Stone Age". Stone age is still stuck back in the stone age and has no fricken clue what to do with all these newfangled machines and healing potions and what not. As such, he is distrustful of anything modern, meaning he can't use TMs, HMs, or any man-made items. The only healing item he can use is Fresh Water and berries, though he'll allow you to use the Pokemon center primarily because he doesn't know what's going on when he's inside that newfangled Pokeball thing. You can't ever box him though or he'll go mad and kill everyone inside the PC box he's in (YES! You will have to RELEASE THEM ALL! Or just start over from your last save... I'm mostly joking but seriously, no PC for him). These newfangled Steel types also rub him the wrong way, so have him solo every Steel type he can, including Byron's gym. Good luck and have fun!