Borax Kid

The Borax Kid is a rock alien, and a friend of the rock alien that encountered the Planet Express crew and played with their genders in 3011. After that rock alien failed to return their original genders, the Borax Kid assisted by returning them.

He used to gamble with the other rock alien, including about whether or not the humans would survive the trip on the rock planet home world. He gambled that they would fail, and won fifty dollars from the other rock alien.

Trivia
As his name suggests, the Borax Kid appears to be made of, or sodium borate, a compound derived from.