I could imagine any Pokémon able to use Hyperbeam which would be a wide-range attack. If a few dozen of these Pokémon would band together and fire their beams at the same time on the meteor I could imagine it would obliterate it.

Another possibility is a Pokémon capable of travelling as high up into the sky as possible, like Rayquaza, and bounce it back into space with an attack like Giga Impact.