Metal Burst returns 1.5 times the damage dealt by the foe's last attack. Unlike Counter or Mirror Coat, Metal Burst does not require specifically physical or special damage sources and Metal Burst does not have decreased priority. However, if the user is faster than its opponent, Metal Burst will fail. The move also fails if it's a Substitute that takes the hit. In Double Battles, Metal Burst will hit the last opponent that dealt damage to the user; Metal Burst cannot affect allied Pokémon.
In Triple Battles, Metal Burst can hit non-adjacent opponents provided a non-adjacent opponent was the last Pokémon to attack the user.
Bastiodon's body glows metallic as an opponent attacks it and it opens its mouth, forming a white ball in front of its mouth. The ball absorbs the attack and Bastiodon fires the white ball at the opponent.
Bastiodon jumps in front of an attack and lets itself get hit with it while standing its ground. As the attack hits it, it raises its head slightly, releasing a powerful pulse of energy from its face outward. The pulse is the opponent's attack, and it is sent back with double the power.