The titular bird is destroying all of Dream Land's crops, and Kirby goes out to stop her. However, when Kirby defeats her, it turns out she was trying to feed her chicks. While Dyna Blade is injured, Kirby takes care of the chicks, including feeding them with Whispy Woods' apples and teaching them to how to fly. In the end, Dyna Blade reappears and takes her chicks over the sea, with Kirby waving them goodbye.
Dyna Blade is divided up into five stages, two trial rooms and a mid-boss room. These are:
The game is represented in a map, so the player can go back and repeat a level as they so choose. While the sub-game isn't unique, gameplay wise, it is unique in the fact that it only has one boss, Dyna Blade herself. All other levels (bar the Trial Rooms) are guarded by mini-bosses. Once the player completes Mallow Castle, Iron Mam walks around the map, and if Kirby encounters her, the player cannot advance until she is defeated.
A strange bird, named Dyna Blade, has come from the mountain and ruined the crops! Unless Kirby can stop him, Dream Land will be devastated!”