This Bellossom is a grass-type Pokémon owned by Erika.
Erika had Gloom corner Miles, who wanted to retreat with Pika he stole.
Bellossom was with Erika, who was passing through Tohjo Falls with Brock and Misty. Erika and Bellossom arrived to the Pokémon League, where the Gym Leaders' tournament was held.
Bellossom was sent to battle Pryce's Swinub. Bellossom started with Petal Dance, which Swinub managed to freeze with Powder Snow.
Erika sent her Bellossom to battle the Team Rocket grunts inside the train.