Danny (Japanese: ダンDan) is the Gym Leader of the Navel Island Gym from the Orange Islands. In order to obtain the Sea Ruby Badge, Trainers must first climb a nearby mountain without the aid of their Pokémon, in order to qualify for further challenges. Should a Trainer qualify, they must then choose one Pokémon to help them build a bobsled-like device in a race against Danny, and then race him down the mountain. This badge is the second of four badges obtained by Ash in the Orange Islands League.
Nidoqueen was used by Danny in the first challenge against Ash.
In the 2nd challenge, Nidoqueen's strength was used to help carve out a sled from Danny's slab of ice.