Thunder (real name hinmatoom, formerly known in the original universe as Chief Thunder) is a traditional Native American Nez Percé tribal warrior, and a playable character in both Killer Instinct (1994) and Killer Instinct (2013). He is the older brother of Eagle.
After the death of Valentina and the events of Mars Ravelo's Darna, Shinubis, a shadow lord and a neutral ally of Valentina is shocked and a little confused. He starts an intensely biggest fighting tournament of all time, the Megaloplex.