Mega Symphonia (M1S) booster box is a 2025 Japanese Pokémon TCG release focusing on the return of Mega Evolution mechanics. It is part of a dual set with Mega Brave, featuring 63 unique cards, including powerful Mega Evolution Pokémon ex with unique black/yellow symbols that grant three prize cards. The set aligns with Pokémon Legends: Z-A and features full-art cards.
