In Blox Fruits, the Unbound Werewolf is a Halloween Event 2025-exclusive boss battle. This boss spawns once every hour in the Observatory, and remains active for 10 minutes before disappearing again.

Blox Fruits introduced the Tiger Fruit with the Trick-or-Treat Event update on October 31, 2025. Alongside the Tiger Fruit, you can also potentially access the Werewolf, a mutated version of Tiger.