Support Pokémon are the Pokémon that are on the player's team while playing a stage. The player can choose up to four of the Pokémon that they have caught to bring to battle on a stage, unless the stage is a 3-Pokémon Stage, in which case the player can only bring three. The first slot is usually reserved for a Mega Evolving Pokémon, since it is required for Mega Evolution for the Pokémon to be in the first slot (in addition to possessing the respective Mega Stone). The other three slots can be any caught Pokémon, but they can't Mega Evolve.