Speed-Racer Challenge of the Masked Racer: Part 2 (1967–1968) Online
Speed Racer and Racer X participate in the Trans-Country race... as well as competitors who stoop to dirty tricks to get rid of them.
| Episode credited cast: | |||
 | Peter Fernandez | - | Speed Racer / James Racer / Racer X / Additional Voices (voice) |
 | Katsuji Mori | - | Gô Mifune (voice) (as Yukiya Tanaka) |
 | Corinne Orr | - | Trixie / Sprytle / Mom Racer / Additional Voices (voice) |
 | Jack Grimes | - | Chim-Chim / Sparky (voice) |
| Jack Curtis | - | Pops Racer / Lionel Racer / Inspector Detector / Announcer / Additional Voices (voice) |
| Rest of cast listed alphabetically: | |||
| Nair Amorim | - | Gorducho |
| Cleonir dos Santos | - | Speed Racer |
| Orlando Drummond | - | Pops Racer |
| Lauro Fabiano | - | Narrador |
| André Filho | - | Corredor X |
| Guálter França | - | Vozeiros |
 | Paulo Gonçalves | - | Inspetor Detetor |
| Selma Lopes | - | Vozeiros |
| Ruth Schleske | - | Vozeiros |
| Carmen Sheila | - | Vozeiros |