Pokémon Diamond, Mt. Coronet.

Hey /games/.  Maybe you guys can help me out here?  Right now I'm stuck in Pokémon Diamond and none of the guides out there on the internet can help me out with this shit.

I'm at Mt. Coronet at the location provided in this picture: http://i6.tinypic.com/4l6gx06.jpg

Hueg pic is huuuuuuuuueeeeeeeeeeeg, I know.  But tell me, why is this faggot blocking my way?

because you dont have a mudkip in your pokemon lineup