Bio Rex

​Bio Rex ​is a playable racer from the F-ZERO series.

The creature Bio Rex was designed by the Keerlon Corporation. His creation is the result of genetic manipulation research that was outlawed on Earth centuries ago. He was created from the DNA of a fossilized dinosaur egg, but altered to have human-level intelligence and increased strength. Genetic design allowed for the development of higher brain functions equivalent to that of a human.

However, before he even got to race, he had to endure several press conferences, interviews, public appearances, and was constantly under constant public scrutiny. Eventually his patience reached a breaking point and his fiery temper caused some rather embarrassing bad press for the Keerlon Corporation. They distanced themselves from Bio Rex, who still intended to enter the Grand Prix. During his first year he as a 'new species' was determined to prove he was superior to human. However the following year he entered mainly to satisfy his ravenous appetite for mammoth ribs.