Standard stages are made only with resources included in the base game (tilesets, backgrounds, and music). There are two types of custom stages, standard stages and advanced stages. Rivals of Aether features a built in stage editor.
Both can be downloaded from Steam Workshop and edited. Guadua was also created as an example of a complex workshop character. Sandbert was reintroduced as an official workshop character. Because Steam Workshop for Rivals uses the same coding aspect for custom characters as the official characters, characters created through Steam Workshop can include complex mechanics not already present in the base game.
