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Erika's Grass-type gym in Celadon City — a glass-paned greenhouse full of flowering Grass Pokémon and paired with the city's finest perfume boutique.
Celadon Gym awards the Rainbow Badge. Its Grass-type battles are slow, patient affairs — sleep powder, root bind, sluggish stat drops — that reward a trainer who can wait out the opening turns. Erika's signature Gloom is considered by her the most beautiful Pokémon in the gym. Team Rocket once set the gym on fire as part of a perfume-theft scheme; Ash rescued her Gloom and earned the challenge and, after winning it, the badge.
A high glass-paned greenhouse full of carefully tended Grass Pokémon — Oddish, Bellsprout, Tangela — among vivid flowers, a koi pond, lattice of ivy. The battle arena is a sunken earthen field in the center. Attached to the gym is Erika's perfume boutique, its shelves lined with crystal bottles.