The Cliff that Time Forgot is an area encountered towards the end of the game. The player can enter this location while in the Lost Underworld. The player can only explore a small island to the right side of this area while entering from the Lost Underworld, prohibiting the player from exploring the rest of the cave until you have gone to Saturn Valley and acquiring the Phase Distorter. After using the Phase Distorter, the player can further explore the cave. Shortly after arriving, the player will encounter the Star Master who will teach Poo PSI Starstorm Ω. Later, after realizing they can't venture further into the cave, Dr. Andonuts will arrive and tell Ness and co. that, in order to face Giygas, him and his friends must travel into the past.