As a Tepig, Bianca had to train it at home because of her father. Her father made her a deal to get a Starter Pokémon, she had to stay home and wait until she turns 12 years old to start her journey with Tepig. So later she trained her Tepig at home and later evolved into Pignite.
It made its first on-screen appearance in Minccino-Neat and Tidy! where it battled a wild Minccino but was defeated by its Hyper Voice and Tickle combo, and it also battled Ash's Pikachu but it was defeated by its Volt Tackle attack. Pignite has been in 2 gym battles by himself since it was the only Pokémon Bianca had. That made him a powerhouse Pokémon in her team since its battle against Elesa's Zebstrika in Enter Elesa, Electrifying Gym Leader! He was the only one who is strong enough for him and stayed in the longest in balttle but evatually lost as the final Pokémon.
It appeared in BW073 and appeared to have evolved. Everyone was surprised to see this. Even more so when he beat Trip's newly evolved Conkeldurr.