Hooktail

Hooktail is the first boss of Paper Mario: The Thousand-Year Door. She is an enormous red dragon who terrorizes the village of Petalburg. Her HP is 20, her attack power is 5, and her defense is 1. Once she ate a cricket and got food poisoning off it, causing her to have an extreme hatred of crickets, and feel woozy every time hearing a cricket chirp.

Hooktail enjoys eating Koopas. She killed Professor Kolorado's father and ate Koops's father, Koopley (though he survived). Mario must find a badge that sounds like a cricket (a frog in the japanese version) to make the battle easier. Her attacks include stomping and breathing fire. With Mario's attacks sounding like a cricket, her attack power goes down, and her defense dropps to zero. When her HP reached zero, she will try to trick him by offering him a thousand coins. (If Mario accepts, she will bite him) and other stuff, including smelling her feet. She will then swallow the Toads in the audience to restore half her HP. The remainder of the fight will take place in the audience seats. Before dying, Hooktail will cough up Koopley and the Crystal Star.

It is implied in Chapter 1 that Hooktail is a male dragon, given that most Koopas refer to her as "him" or "he". However, when Mario fights Gloomtail, he refers to Hooktail as his precious younger sister.

She is one of the Shadow Queen's three pet dragons. She has two older brothers named Gloomtail and Bonetail. Of the three dragons, she is the only one who has a castle.

Hooktail is one of four enemies who eats or absorbs the audience members. The other three are Cortez (who eats their souls to replenish his HP), Lord Crump's robot Magnus Von Grapple (who sucks them in and uses them for ammunition), and the Shadow Queen (who absorbs them to heal all her HP).

Trivia
Her name might come from Valoo, a dragon from Legend of Zelda: The Wind Waker, who looks similar to him, and whose tail looks similar to a hook.