Red Key

In the first game, the Red Key (あかいかぎ Red Key) is found on the third level of Crossbone Isle. It is used to open a red door that keeps players from moving on to the next level.

In the second game, the Red Key is an item found in the Jupiter Lighthouse. It grants access to one of the two "towers" where the player must activate a statue figuring a bowman in order to open the top of the lighthouse.