- Voiced by: Kurt Csolak
A new student at the Racing Academy. He is later revealed to be the son of the original Speed Racer and younger brother to X Racer.
- Like Father, Like Son: Like his father, he is very skilled racer.
- Orphan's Plot Trinket: The key and bandanna he was left behind with. The key was to find the parts of the Mach 5, while the bandanna was used for the Mach 6's gasless engine.
- Voiced by: Carter Jackson
A student who is a big fan of the original Speed Racer. He is known for being the best mechanic in the school.
- Expy: He shares the same role as Sparky in the original series, who was the mechanic to Speed's father.
- Fanboy: Of the Original Speed Racer.
- Genius Ditz: He is smart at building and fixing things, though he gets easily distracted.
- Irony: The one day he decides to wear something other than his Speed Racer outfit is the beginning of the week when every student is supposed to wear the school's colors.
- Whole Costume Reference: His outfit is a reference to the original Speed Racer.
The youngest brother of the original Racer family, and headmaster of Racer Academy. He is the uncle to Speed Jr and X.
- Same Character, but Different: Remember the kid who used to ride the Mach 5's trunk? Well, this is the same character, but matured!
Speed Racer, Sr
The original Speed Racer in the series series, and the father to both X and his son that shares the same name.