Sunset Colosseum (Japanese: サンセットコロシアムSunset Colosseum) is a Colosseum in Pokémon Battle Revolution. It is led by Dusty, and unlike other Colosseums, there are only four battles that take place in it.
Battles take place on a round platform surrounded by water. There are arch-like structures encircling it, as well as a sunset in the background over the ocean.
Rather than using their own Pokémon, the player is shown a random selection of 12 Pokémon before the battle begins. They are able to choose three (four for Double Battles) to use while the opponent chooses from the same pool. However, the opponent's team is chosen from a subset of six Pokémon unique to them (this can be observed through multiple unsaved attempts before clearing Stargazer Colosseum for the first time). Because of this mechanic, the Trainer Card one uses doesn't really matter, in fact even Blank Trainer cards can be used. It also means that there might be situations where the player and their opponent both have the exact same Pokémon. This type of Pokémon Battle is known as the "Select Battle".