Marvin the Tap-Dancing Horse Season 2 Episode 10 Marvin Keeps Track / Diamonds' Dance Party Episode Title:Marvin Keeps Track / Diamonds' Dance Party.Episode Description: MARVIN KEEPS TRACK Marvin is less than thrilled when his brother Clyde comes for a visit. You see, whenever they get together they have a race, and Clyde always wins, since he's a champion racehorse. Letting his competitiveness get the best of him, Marvin goes into frantic training instead of spending time with his brother. The race comes and Clyde wins again, but Marvin has learned that you can't be good at everything. EDDY'S SLEEPOVER Diamond is in charge of planning a big party in appreciation for Jack. She soon learns that everyone has an opinion on how things should be done, and realizes she can't please everyone all time.