The team behind Dolphin created the RVZ file format in 2020. Dolphin allows players to load Wii and GameCube disk images saved in various formats, including. To play a game in Dolphin, gamers must first acquire a disk image that contains a virtual copy of that game. Dolphin is a cross-platform Wii and GameCube emulator that gamers can use to play Wii and GameCube games on their PCs.