This Gyarados is a water/ -type Pokémon that is befriended with Nurse Joy.
Gyarados does not belong to Nurse Joy, per se; they became friends. Unlike other Gyarados, which are usually violent, this one remains friendly to Nurse Joy even after it evolved from a Magikarp.
||The Joy of Pokémon
|+ indicates this Pokémon used this move recently.*|
- indicates this Pokémon normally can't use this move.