which achievement is it? the glork one is pretty easy, just mash the x and y button. my strategy for that is to just keep your fingers stiff and only move your wrist. the arena achievement is somewhat hard but it doesn't matter what level you or your opponents are, your still going to have the same stats and if the use a nooby static like keeping you up in the air untill you die, then just use your magic, it should kill them. i hoped i helped bro.