Bowser's Castle 3 is a level in A Koopa's Revenge. It is the final level of Bowser's Castle and third level overall. It is a short level with Thwomps and Fireballs that act as obstacles. This is also the level where Koopa will fight the first boss. After completing the level, Koopa will gain access to the Mushroom Forest. This level is preceeded by Bowser's Castle 2 and suceeded by Mushroom Forest 1.
Koopa starts at a place where there are many ? blocks and makes his way through a series of Thwomps that leads him to the door to the next room.
As Koopa jumps across the lava, another Thwomp surprises him, leading to a bridge with Fire Balls. Koopa finally reaches a big red door that will lead him to one of his Goomba friends. Koopa must now fight the first boss, Wario.
Main article: Wario
The Pipe Passage Secret
At the beginning, Koopa is surrounded by many ? blocks. Jump to the top of the blocks and quickly jump through the left wall. Koopa will fall onto a platform with a green pipe that'll lead him to a level full of pipes or the Pipe Passage.