World 9-9

World 9-9 may refer to:
 * Stage 9-9 in Donkey Kong for the Game Boy.
 * Golden Temple, World 9-9 in Donkey Kong Country Returns 3D.
 * Follow That Shell!, World 9-9 of New Super Mario Bros. U.
 * Flying Squirrel Ovation, World 9-9 of New Super Luigi U.