To obtain the bubble badge you must dive down into the depths and navigate your way through a coral reef with various trainers along the way possessing a variety of water pokemon like corsola, octillery, quilfish and alomomola.
Arriving at an opening you find the scuba diver gym leader couple and must beat them in a double battle.
Music like this plays throughout the gym.
https://www.youtube.com/watch?v=fZdsd6mfQsINot a strong gym at all, but pleasantly themed I think.
