Returning to another Generation III starter, there really isn't much to dislike about Mudkip/Marshtomp/Swampert. Specifically, Marshtomp and Swampert possess arguably the best type combo of any ...
While Blaziken is an incredibly powerful Pokemon, choosing Mudkp in order to evolve it into Swampert is the best choice. It is only weak to Grass-type moves. Though it is a double weakness ...