Chilli Billi is one of the boss of Hailfire Peaks, a trait he and his brother, Chilly Willy. share. He appears in Banjo-Tooie. When Banjo and Kazooie first arrive in Hailfire Peaks, it is on the fiery side, and Billi is greatly angered by this. For trespassing in his dominion, he fires fireballs from his volcano home in an attempt to deep fry the two heroes. However, his gets sloppy and eventually destroys a stone structure that is guarding a Flight Pad, which Banjo and Kazooie need to get to the violent reptile king. When they arrive at the volcano, Chilli Billi asks if they are pizza delivery boys, and when Banjo and Kazooie state that they aren't, then Billi battles them. Depending on which brother was fought first, either he or Chilly Willy will give the duo a well-earned Jiggy.