Battle Frontier (Japanese: バトルフロンティア Battle Frontier) is a Stadium card. It was first released as part of the EX Emerald expansion.
This card was originally released in the EX Emerald expansion, originating from the Mirage's Mew Constructed Starter Deck. It was reprinted in the EX Power Keepers expansion
The first Battle Frontier was introduced in Pokémon Emerald.