You forgot the Lati Twins, who are Dragon/Psychic, but oh well.
The Answer to your question is Slaking, who has a BST of 670 if I'm not mistaken.
Crap, I'm running out of question ideas XD
Name a Fire-Type Pokémon that can learn a Grass-Type move. (besides Solarbeam and not counting Flame Plate Arceus)
EDIT: In fact, name all 6 :P
Brock has Onix and Rhyhorn.Coral-Eye, Sea Ruby, Spike Shell and Jade Star.
In HG/SS, which Kanto Gym Leader has at least two unevolved Pokemon?
Wasnt it kecleon?^I beleive it was Wynaut in the episode they were looking for Clair's Pokemon, or something like that?
What type was the move BITE in generation 1?
Is it Bulbasaur?What was the first pokemon ever created when referring to index number?