From WiKirby, your independent source of Kirby knowledge.
Mallow Castle is the second stage of Dyna Blade in Kirby Super Star and its remake. As the name implies, it takes place in a castle and the surrounding courtyard area.
Kirby and Sir Kibble exploring a courtyard section
The stage begins out in the courtyard, west of the castle proper, with a bunch of Parasol-wielding foes guarding the entrance. From there, the path leads into the castle, through the halls past numerous guards and lots of side-chambers. In one particular side-chamber, Kirby will have to deal with the Meta-Knights. Another side-chamber contains a Big Switch which can be pressed to unlock the first Trial Room. One of the halls further in is an auto-scrolling section, where Kirby can potentially get crushed if he is not quick enough. At the end, Kirby can race outside the castle using the Wheel ability, then face down Bonkers. Using the Hammer ability, Kirby can then destroy the castle to get some extra goodies before completing the stage.
Big Switch location
Kirby revealing the room to the Big Switch (top) and floating up to the Big Switch within the room (bottom) in Kirby Super Star Ultra.
At the start of the level, after Kirby enters into the castle, he must continue forward until finding a ladder. He must climb up the ladder to the second floor, where there is a Bomb Block trapped between some blocks. Kirby cannot reach it by himself, so he must continue left to the Simirror and swallow it for its Mirror Copy Ability. With it, Kirby must use the Reflect Force move to reach the Bomb Block, which breaks all the blocks and reveals the door to the Big Switch room. The room is empty aside from an airborne platform with the Big Switch. By pressing it, the Trial Room 1 is unlocked from the stage select map.
Kirby exploring an outside portion of Mallow Castle in Kirby Super Star Ultra
Kirby exiting from the castle in Kirby Super Star Ultra