Pokémon Legends Z-A Mega Dimensions continues the main story from Pokémon Legends Z-A rather than a separate narrative. Lumiose City faces more trouble with mysterious distortions appearing in the vicinity that relate to a new realm: Hyperspace Lumiose. Team MZ is forced to explore the new reality to stop any dangers for the city, which will make the young detectives face Pokémon like Hoopa and Mega Evolutions of Raichu.
The DLC is currently planned for release on February 28, 2026 for Nintendo Switch 2. The DLC will also include unique clothing to wear in the main game: Holo X and Holo Y. The items will be available on October 16, 2025, after the player has unlocked the option to customize clothing within the game.