【How-to】Can you get regigigas in platinum

First off, Regigigas can only be obtained by players who own the DLC for Pokémon: Sword & Shield, and players will either need to own two copies of the game or have someone to trade with. Regigigas requires players to have possession of all five Regis: Regice, Regigigas, Regirock, Regidrago, and Regieleki.