How many times can you battle Giratina in Pokemon Rumble Blast?

In Pokémon Rumble Blast, you can battle Giratina a total of three times. The first encounter occurs in the Distortion World stage, and you can battle it again in the same stage after completing the game. Additionally, Giratina can be found in the Battle Royale mode, adding up to three opportunities to face this Legendary Pokémon.