Rhydon

Protected by an armor-like hide, it is capable of living in molten lava of 3600 degrees.

Horn Attack (30)

Ram (50): Rhydon does 20 damage to itself. Your opponent switches the Defending Pokémon with 1 of his or her Benched Pokémon, if any. (Do the damage before switching the Pokémon. Switch the Pokémon even if Rhydon is Knocked Out.)