Bastiodon would like Solid Rock too. And seismic toss, or at least a Rock or Steel type variantAggron needs the solid rock ability.
Just about everyone has a fighting move, espeically that focus blast. Also earthquake is the most common of all moves.
His high defense can't tak on those x4 moves, espeically that focus blast.
I know that this post is old here, but I just HAD to point out the sheer unique idiocracy of this poster.They make children feel bad about themself for having penises and nipples when they dont have it in Pokemon... I remember i felt that way.
But then it would gain a weakness to Fire and Gound. So it wouldn't matter anyway.I know I am going to get flamed for this...but Mewtwo just needs something.
Possibly like a Metal suit as in the anime.
And yes I know Anime=/=games.
But think of a Steel/Psychic Mewtwo. Able to get over the weakness in Bug and dark.