The Navel Gym (Danny) is the second Orange Island Gymleader in the game. Defeating him will earn you the Sea Ruby Badge 
, which is needed (as well as the other badges) to catch the Legendary Pokemon.
Danny's Pokémon Team:
- Level: 50
- HP: 200
- Level: 50
- HP: 200
- Level: 52
- HP: 208
- Level: 51
- HP: 204
- Level: 52
- HP: 208