The Altar of Oblivion is a special location secluded from many areas of the world, notably being accessible from the Hoenn and recently found to be accessible from the faraway Clarr region. The Altar of Oblivion is notable for being a place forbidden to many trainers in that the area houses almost no Pokemon, along with the true Altar being hidden within the surrounding castle. The castle is taken over and is fought over by the teams Flare, Rocket, and the reborn Team Galactic in that the entire area is known to house multiple legendary Pokemon, such as Rayquaza, Kyurem, and even Arceus. It is also the place where a special tournament, dubbed "Clash of Champions" takes place, where the strongest trainers battle it out in the Colosseum area.