The bird made its first appearance when Mario made his way to the top of Mount Volbono. Furious Cookatiel was about to blow Mario off the mountain, but a volcanic eruption tossed Mario off.
Mario later encountered Cookatiel after capturing a Lava Bubble by using a cannon to go to the top of the mountain.
The battle begins when Mario captures a Lava Bubble with his hat and is sent to the top of Mount Volbono via cannon. When Mario encounters him, Cookatiel will start throwing bell pepper-like rocks, and green, spikey balls into the strew.
In order to damage Cookatiel, Mario must use the Lava Bubble's ability of lava swimming to swim up Cookatiel's lava barf (Cookatiel will shoot spiky balls at Mario to stop this), and to jump on top of it's head to damage it. Like most bosses, the Cookatiel is defeated after being hit three times.
Once defeated, the Cookatiel will fall into it's own soup.
- The Cookatiel's name is a portmanteau of "cook" (which is showing it's cooking outfit) and "cockatiel" (species of bird).