Shelly

Shelly is one of the three Aqua Admins in Team Aqua. She appears in the Generation III games.

Shelly is a very strong trainer. In Sapphire and Emerald she appears first at the weather institute and then at the Seafloor Cavern. In your first battle against her, she has a Carvanha and a Mightyena. At the Seafloor Cavern the only change is that her Carvanha has evolved into Sharpedo. Shelly doesn't appear in Pokémon Ruby.

In the anime Shelly has a Carvanha but instead of a Mightyena she has a Walrein and a Crawdaunt, but she is a scuba diver.

First Battle
Reward: 1120

Second Battle
Reward: 1520

First Battle
Reward: 1120

Second Battle (May be with an Aqua grunt)
Reward: 1720

Trivia

 * The only time Shelly didn't wear her bandana was in "The Three Team Scheme."
 * Both Courtney and Shelly start with "Ahahahaha!" in the beginning of their conversation with the player before the battle.
 * The length of her top seems to differ between the games and the anime: in the anime it is a sleeveless shirt, but in the games it is a bikini.