Golem

From the Pokémon Encyclopedia

Golem is a Pokémon that you can only obtain by trading. If you receive a Graveler in a trade, it will evolve into Golem. Golem is a Rock-type Pokémon, with high Defense that gives it an advantage over Normal-type Pokémon. Golem can learn Explosion, Stone Edge, Earthquake, and Double-Edge.

When Defeated in battle, Golem gives 3 EV points to the defense stat.