- "¡Madeline! ¡Te puedo mostrar una lámpara mágica! (Madeline! I can show you a magic lamp!)"
- ―Pepito offers to show Madeline a magic lamp he and his parents have in their house.
Pepito is arguably the best supporting character in the Madeline series, and Madeline's next-door neighbor. He is Spanish and has three cousins. He wears a distinctive hat called the “bad hat”. Although he was originally very mean, he has become close with Madeline and they are now good friends. Pepito has often been helpful as well, such as helping to defeat the kidnappers in Madeline: Lost in Paris. However, Pepito often gets into problems as well, such as being trapped with Madeline at the carnival, being depressed during dinner to the point where he becomes sickly thin, and being upset with his cousins.
The son of the Spanish Ambassador, he is roughly the same age as the girls (8), he has dark hair, and often wears a red shirt with white sleeves. In Season 3-4, his sleeves changed to gold. While initially cruel to animals and sadistic towards Madeline and her classmates, he had a change of heart and vowed never to hurt a single animal on an empty stomach after being mauled by a pack of dogs during a failed attempt at provoking them on one of the annoying girls.
He is confirmed to be 8 years old, since it is revealed in "Madeline and the Mummy" that his uncle Pablo mentioned that King Tutankhamen came into power at 9 years old. Pepito then replies "That means I am almost old enough to be king!".
It’s implied that Pepito has a crush on Madeline.
Pepito was Neutral Evil in his debut, but later episodes see him change his alignment to Neutral Good.
In the live-action film, Pepito appears to be somewhat older than the girls and in place of a "hat" he drives a Vespa. Unlike in the books and the TV series, where he reforms after one of his mischievous pranks goes wrong, he appears to reform sometime during/after the scene where the girls pull various pranks. Also has a "tutor" in the film, who turned out to be his kidnapper.