An athletic robot enters school grounds upon hearing that it's Sports Day. At the sports fields, Deep wonders why it's still happening since many students are ill with the flu, but Amato remains enthusiastic. In the 100 meter sprint, Amato is about to cross the finish line first - but the athletic robot zips right past him, knocking all the runners off their feet. He introduces himself as Champbot, and Amato outcries that robots can't compete in human sports, but the principal on the speaker says that anyone is allowed to register since there aren't many students joining this time.
MechaBot is honored to finally meet Champbot, as he holds every track-and-field record of the Robolympics. Amato points out that Champbot's legs have rocket boosters, but the principal says they shouldn't be jealous of another's abilities. Amato uses this to his advantage in the 4 x 100 meter race. While Deep, Mara, Pian and Amato work in one team, Champbot detaches himself to have his body parts as the 4 runners. MechaBot propels the human team as a rocket chair for Deep, a rocket for Pian, and to mechanize Mara's wheelchair, while Amato lastly uses him to sprint to the finish line, winning only by the length of his tongue. Champbot demands a rematch, which Amato accepts.
MechaBot suggests they play the space sport "sepakkasa", which is similar to "sepak takraw", except that it's 1 vs. 1. If Champbot wins, Amato wears one of his self-designed shirts with "Mechamato Loser" written on it, but if Amato wins, he captures Champbot. Deep and Pian host the game, and Mechamato learns another feature of "sepakkasa" - the ball explodes when it hits the ground. With one last point for Champbot to win, Mechamato begins to doubt - until he hears the crowd cheering him on, hitting the balustrade with plastic bottles to make noise.
Mara throws some bottles to Mechamato, who equips them to his legs and back as rocket boosters to improve his speed and put him at equal footing to Champbot. He catches up, gets the match point, and wins with a kick making the ball too fast for Champbot's leg to handle, sending him flying off the playing area. He's unhappy to lose, but to his surprise, Mechamato thanks him for the good game and teaches him that sportsmanship is all that matters and gloating is not needed. Champbot gracefully accepts defeat and allows himself to be captured as promised.
This episode provides examples of:
- Arrogant Kung-Fu Guy: Champbot is very showy and vocal about his athletic abilities, constantly calling himself a champion and other people losers.
- Ash Face: When Mechamato accidentally kicks the "sepakkasa" ball towards Deep and Pian, who are acting as game hosts for the match between Champbot and Mechamato, the ball explodes near them. Deep and Pian are dirtied by ashes on their faces and clothes for the rest of the episode.
- Defeat Means Friendship: After Mechamato defeats Champbot in the final game, the latter expects the hero to gloat, but Mechamato instead thanks him for the good game. Amato and his friends explain that being a good sport is more important than winning, then Champbot calls him a friend before allowing himself to be captured as agreed.Champbot: An opponent, and a gracious friend. You are a true champion, Amato!
- Detachment Combat: Champbot can detach his body parts to play as 4 runners in a 4 x 100m relay race, with his torso, two arms and pelvis with legs at each of the checkpoints. Each body part has a face and is equally capable in mobility, even his torso and arms which each gain little legs.
- Gratuitous English: Champbot says "loser" a lot even in the Malay audio, and one of his lines there is the same as that in the English audio.Champbot: Please remember, 2nd place is the first loser!
- Loophole Abuse: In "A Sore Winner", due to the absence of students during flu season, the principal allows for anyone to compete on Sports Day, including Champbot, who he doesn't consider to be a cheater despite having rocket propellors, saying "you should not be jealous of someone else's abilities". Amato then decides to make the best of his and MechaBot's abilities for the subsequent games to defeat Champbot.
- Lost in Translation: In "A Sore Winner", Champbot shows that he can compete in a relay race alone by detaching his arms and pelvis from his torso to act as 4 runners. In the Malay audio, upon doing so, he says "Tengok kaki lah [...]!" which is a Malaysian figure of speech to say one is capable. It directly translates to "look at my feet" which is a pun referring to his detached legs. In the English audio, this gag is absent as Champbot says "You haven't seen nothing yet!" instead.
- Super Wheelchair: MechaBot mechanizes with Mara's wheelchair for her section of the relay race, turning it into a motorized rocket-propelled chair that allows her to zip around the track like a race car.
