You will be able to customize the trainer you create in Pokémon Legends: Arceus with various cosmetic items. These items will give your character a unique look, making them stand out as they travel through Hisui's historic landscape. For those who want to add The Evil Fox Mask to your inventory, be sure to prepare to grab the game early.
The Baneful Fox Mask will be available to all players who purchase Pokémon Legends: Arceus prior to its release on January 28, 2022. You can purchase it directly from the Nintendo eShop page or visit the Pokémon Legends: Arceus website. Both take you to the same pre-order page.
You will have to wait for the game to be fully released before redeeming it. However, The Baneful Fox mask will be available to anyone who pre-ordered the game through the game's Mystery Box system, similar to how many other Pokémon pre-order items have been delivered to trainers. You will then be able to don The Baneful Fox mask and run for Hisui with it.
In addition to The Baneful Fox set, anyone who pre-orders the game will receive the Hisuian Growlithe Kimono set. You will need internet access if you want to recover these items in the game.