Gate Cliff is the first level of World 6 in Paper Mario: Sticker Star.
Gate Cliff is mainly a giant rock on water which guards Bowser's Castle.
Mario and Kersti arrive to a large stone door which seems heavily closed. Kresti then points out the Royal Stickers which they start to glow on the door. After that and Paperizing the area, Bowser's Castle is finally shown but it is high up in the skies. Mario and Kersti then head back to Wiggler's Tree House as their Wiggler friend is now a full-grown Flutter. He agrees and takes them to Bowser's Castle ending this very short level.
- The events of the Gate Cliff are foreshadowed at The Enigmansion on the Big Bookcase where it mentions the Royal Sticker lights illuminating the wall.