BioWulfric is the Gym Leader of the Snowbelle Gym located in Snowbelle City in Kalos. He specializes in using Ice-type Pokémon and trainers that defeat him receive the Iceberg Badge. He finds cold temperatures just right for his body temperature.
Sawyer (Scottie) defeated Wulfric in a heated battle a few days before Ash showed up for his gym battle.
Ash challenged Wulfric for his final badge and Wulfric noted that this gym battle would determine if he'd get his 8th and final badge. He told Ash that Ice is both extremely hard and terribly fragile at the same time and that the choice of Pokémon he decided to use would affect his battle strength.
Wulfric's Bergmite was the first Pokémon sent out to battle in rematch of Ash versus Wulfric. It was matched up against Pikachu. After Pikachu was able to run off the freezing effects of Icy Wind, the match significantly took a turn into Pikachu's favor and it was quickly able to land a few good hits and finished of Wulfric's Bergmite with an Iron Tail.