In Pokemon FireRed and LeafGreen, the Altering Cave is a seemingly empty cave that is only home to wild Zubat, located on Outcast Island, which can be found by going north of Six Island (Sevii Islands ...

Outcast Island is home to the Altering Cave, plus a variety of battles and items to find. This Pokemon FireRed and LeafGreen guide walks you through Outcast Island, including wild Pokemon encounters, ...