Speed Racer is the star of a Japanese 1960s old anime (japanese cartoon) with the same name. Due to the constant fast speaking dialog (used to match the English words with the Japanese lips when dubbing to English at this time) and gasping, it was parodied all over the country in different shows.
As you can see, Speed Racer is friends with Noah. Him, Pops, Spritle, Chim Chim, Trixie, Sparky and Racer X has appeared. Appearently, Spritle and Chim Chim have been working for Mitch Tennison for candy and ice cream. A running gag is that people mock Sparky for his buck tooth.