Best answer: In Pokémon Sword and Shield, a Pokémon who Gigantamaxes grows to a humungous size during battle. This transformation changes the look of the Pokémon, increases the stats, and allows them to use a special G-Max Move. However, only some Pokémon can Gigantamax.Flashing steel: Pokémon Sword ($60 at Amazon)Defender of the realm: Pokémon Shield ($60 at Amazon)