Blastoise
Shellfish Pokémon
It deliberately makes itself heavy so it can with stand the recoil of the water jets it fires.
Base Stats
Type Effectiveness
Evolution Chain
Moves
Details
Sprites
Competitive
Strategy Overview
Blastoise is a generic "bulky Water". It has good overall stats (defenses especially) and uses some good support moves, Reflect and Rapid Spin in particular. It is just a no-nonsense tank Pokemon: it's made to do one thing, and it does it well. It's UU because it isn't quite as defensive as Pokemon like Suicune or Slowbro (Slowbro also has the handy Thunder Wave), but it is not quite as fast and does not have as much variety as something like Starmie (who can also Reflect and Rapid Spin). Don't be fooled, though; Blastoise is not a bad Pokemon by any means, but as previously stated, Blastoise only plays one role.
Common Teammates
Competitive data from Smogon University via data.pkmn.cc