Hiei is a new character in Super Smash Bros. Crossover. He first appears during Season 15 to help the Heroes of Legend, Yugi Muto/Yami Yugi, Jaden Yuki, and Yusei Fudo in their struggle against Yami Bakura and Zorc Necrophades, though his reasons for doing so are unknown. When Naruto Uzumaki and Psycho Kirby prepare to enter Zorc's body to destroy him, Hiei jumps on to help them out. Hiei and Psycho Kirby then go on ahead while Naruto duels against Yami Bakura.
Hiei's appearance is based off his usual appearance in Yu-Yu Hakusho
- Hiei is the only fan request at the moment that was not shown having any contact with Marik Ishtar from Yu-Gi-Oh Abridged.
- Hiei is the first demon to appear in Super Smash Bros. Crossover.
- Hiei's voice sounds similar to Android 17's voice in Dragon Ball Z Kai.
- Hiei is one of the few characters to have his own theme music.