Amount of Floors - 20 Unlock Criterea - After clearing Stormy Sea and rescuing Medicham from Wish Cave, talk to Ekans and Medicham at Pokemon Square, event should start next time you wake up. Unlocked after visiting Mt. Freeze with Gengar Notes -
Japan: November 17th 2005 US: September 18th 2006 Europe: November 10th 2006 Wii U Virtual Console Europe: 11th February 2016 Japan: 23rd March 2016 US: 23rd June 2016