The Pokémon TCG Mega Evolution Perfect Order booster box is a factory sealed English display of the ME03 expansion. It is the standard format for set builders and anyone opening at volume.

• Set: Mega Evolution, Perfect Order (ME03)
• Contents: 36 booster packs
• Featured: Mega Zygarde ex, with Mega Clefable ex, Mega Starmie ex, and Mega Skarmory ex
• Expansion size: 124 cards, including 36 secret rares
• Theme: the first main expansion based on Pokémon Legends: Z-A and Lumiose City