Trapdoor (Wario World)

Wooden trapdoor

Steel trapdoor

The two varieties of trapdoors, as found in Horror Manor

Trapdoors are doors that lead to special rooms in Wario World. They come in two variants: wooden trapdoors, which are marked with X shaped bandages and can be entered with a simple ground-pound, and steel trapdoors, which require Wario to Piledriver an enemy into them to get through.

There are eight trapdoors in each stage in Wario World, each of which lead to sub-levels containing a variety of different challenges. These sub-levels themselves come in two variants; ones that take place in an enclosed sub-terranean area with stage-specific theming (as are common in wooden trapdoors), or ones that take place high in the sky (as are always found through steel trapdoors). The former type are typically small puzzles or puzzle-platforming challenges, while the latter type tend to be rigorous and oftentimes lengthy platforming challenges akin to the "secret" areas in Super Mario Sunshine. Falling into the void in these challenges will force Wario to restart the challenge at no cost, without being sent to Unithorn's Lair.

Each trapdoor contains two rewards; one of which will always be a red diamond, which is usually found at the end of the challenge. Other possible rewards inside trapdoors include Gold Statue pieces, Spritelings, and wooden chests. As trapdoors become more difficult in later levels, some rewards start to be placed halfway through the challenge instead of at the end.

The similar but mechanically unrelated Goal trapdoors, also known as Boss Trapdoors, are located at the ends of levels and lead to boss battles. Stone Doohickeys sit on top of these trapdoors, and the only way to remove them is to bring a certain number of red diamonds to them. The number of diamonds necessary to remove a Stone Doohickey increases as Wario progresses through the game.