On 22 April 2007, three-time FIFA World Player of the Year Ronaldo moved from the football pitch to the small screen with a guest appearance on The Simpsons. He provided the voice for an animated version of himself in the episode that aired that night.
The episode's main plot concerned Marge's and Bart's participation in an online game called "Earthland Realms." Ronaldo showed up in the secondary plot in which Homer becomes a referee for Lisa's football match.
Homer awards a free kick when Lisa takes a dive, but when she tries a second dive, Ronaldo arrives and explains to Homer how "floppers" are ruining the sport. In response, Homer shows Lisa a yellow card, but she tears it up, forcing Homer to show her a red. As she exits the pitch, Ronaldo shouts "Another family broken up by Ronaldo! Yes!"
Ronaldo appears again near the end of the episode as Homer and the kids are playing football in their back yard. Homer demonstrates some impressive moves, to which Ronaldo says "Ha ha ha, I have taught you well," then thinks to himself "Too well."
While promotional images for the episode showed Ronaldo in his Brazil kit (as pictured), he appears in the episode wearing the all-white home kit of Real Madrid, his club at the time.