Wily Castle

Wily Castle is a stage that appears in both Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U and a recurring location in the. The castle itself is based on its appearance from . While both versions are near-identical, the Nintendo 3DS version takes place during the day, while the Wii U version takes place at night. The main body of the stage is flat, with two floating platforms at either side, suspended beyond the body of the stage.

In the Wii U version of the stage rails like the ones from Mega Man 2's Crash Man stage and the fourth Wily Castle stage will appear around the left platform, and the platform will move along the rail. Similar to Guts Man's stage from Mega Man, these rails will have breaks in them which, when the platform crosses them, they will drop temporarily until it reaches a solid rail again. There may be more than one possible rail configuration.

In the Nintendo 3DS version, platforms occasionally appear above the stage that fly back up after a while. In addition, the pendulum platforms from Bright Man's stage in Mega Man 4 occasionally appear on both sides of the main platform, and move back after a while.

At times in both versions, the Yellow Devil will appear in the background, disassemble and fly up, then descend and reassemble on the stage. When the Yellow Devil is formed, it will attack the players with its own body until it is defeated by taking a sufficient amount of damage from the players, though only its eye is vulnerable. Once defeated, the Yellow Devil will explode, and this explosion will count as an attack for the player who landed the final blow.

Wily Castle will reappear in Super Smash Bros. Ultimate, where hazards from both the 3DS and Wii U version will make an appearance.