TO GO TO SLEEP TOWER YOU MUST GET ALL POKEMON IN POKEMON TOWER(NOTE:CAPTURE 2 HAUNTERS AND MAKE ONE HAUNTER EVOLVE BY TRADING HAUNTER TO TURN TO GENGAR) AND CAPTURE THE 2 SNORLAX. PUT THE POKEMON IN ORDER:
1.GASTLY
2.HAUNTER
3.GENGAR
4.CUBONE
5.SNORLAX
6.SNORLAX
AND GO BACK TO POKEMON TOWER AND IT WILL BE SLEEP TOWER. THERE WILL BE A POKEMON CALLED "SPOOKY" THERE!