Crystal Colosseum (Japanese: クリスタルコロシアムCrystal Colosseum) is a Colosseum in Pokémon Battle Revolution. The Colosseum is led by Voldon.
Crystal Colosseum is set in a cave deep underground, lit by glowing crystals situated on the walls and floors, as per its name. Stalactites, stalagmites, and pools of water are everywhere.
The battle type of this Colosseum is Tournament Battle, similar to the Battle Dome in Emerald. Trainers go up against each other in a multi-round elimination contest, with the winner of each battle advancing to the next round while the loser is eliminated. The tournament starts off with sixteen Trainers, narrowing down to eight in the second round, and then to four in the third round, and then just two in the fourth, the contest final. The winner of this round earns the right to challenge Voldon.
After winning Pokétopia Championship at Stargazer Colosseum, the player may select the Level 50 All. The order of the players' brackets will be slightly different, but the rules remain. Clearing the first Level 30 Open battle rewards a Pikachu Bag, a Battle Pass with a Crystal Colosseum background, 9 items, and 550 Poké Coupons. Beating the first Level 50 All battle unlocks 23 pieces of gear, and Voldon's Electivire Outfit.
The default mode of battle here is Double Battle. An option to change this to Single Battle is unlocked after beating Rank 2 for the first time.