|Boss||Koffing and Zubat|
|Team Members Allowed||3|
Beach Cave (かいがんのどうくつ Coastal Cave) is the first dungeon in Pokemon Mystery Dungeon: Explorers of Time, Darkness, and Sky. It consists mainly of Water -type pokemon. The protagonist enters this dungeon with their partner to retrieve the partner's Relic Fragment from Koffing and Zubat, who are also this dungeon's bosses.