The Pokemon Indigo League (also known as the anime series Pokemon: Indigo League) features the following caves:
* Mount Moon: The first cave the protagonists, Ash and his friends, encounter.
* Rock Tunnel: A cave filled with trainers and a Rock-type gym leader.
* Seafoam Islands: A series of caves with a Psychic-type gym leader.
* Victory Road: A large cave complex leading to the Pokemon League.
It seems like you might be thinking of a cave from a different Pokemon game or anime series. Can you provide me with more information about the cave you're looking for?