Um... I thinking not an advanced arena (Cause I would suck)
Asteroid (Outdoor Custom Arena): Pokemon battle on a titanic battlefield, that stretches miles, from end to end.
Most of the asteroid is flying apart, so permanent firm ground is not expected. Occasionally pieces of rock come flying down, some as small as a basketball, and some the size of a small house. The background view is fantastic, Earth fills the entire view. Great spires of rock spill out of the ground, and canyons and plains are common. The gravity is 1/2 the Moon's (1/12 of Earth), so you can jump very, very high before coming down. Since there is no air, I had to compromise with a air generator. Fire attacks are severely weakened, because of the lack of air, even though I have made a habitable atmosphere. If you want a clear picture of this, I suggest you watch the movie Armageddon. Occasionally, vents open and geysers open up with steam. if you do not want to be sent flying around, I suggest to be wary.
Sound good?