Mega Symphonia Booster Box

Pokémon Card Game MEGA Expansion: Mega Symphonia

The Pokémon TCG: Mega Symphonia (M1S) expansion is a landmark Japanese release that officially brought the "Mega Evolution" mechanic back into the modern game. Launched on August 1, 2025, it serves as the sister set to Mega Brave (M1L), with both sets later merging for the international English release titled Mega Evolution.