Always Someone Better: Tries very hard to be this to Chavo. When he sees El Chavo playing with a homemade toy, he immediately goes to his home and returns with a shop-bought version of said toy. In other times, in which El Chavo was given some money in exchange of a favour, Quico tries to top it.
Disappeared Dad: He explains in the tie-in book that his father, Federico, was a sea captain who went down with his ship, which is implied in the series when his father makes an appearance in a flashback in one episode (also played by Carlos Villagrán).
Freudian Slip: Whenever he slips and calls Profesor Jirafales "Daddy".
Improbable Weapon User: He would use his large bouncy ball to hit people over the head. It's especially noteworthy in the episode where the kids think the vecindad is haunted and they grab things to defend themselves from the ghost. While Chavo uses a broom and Chilindrina uses a frying pan, Quico used his rubber ball. Ironically enough, it seemed to actually hurt most of the time.
Innocently Insensitive: Sometimes he ends up insulting his mother without himself realizing. For example, in one episode in which Don Ramón works as a junkman:
Doña Florinda: I think I have some things I can give you that I don't use anymore.
Don Ramón: Makeup?(cue Doña Florinda's Death Glare) Because some women have to use makeup twice or thrice a day...
Quico: My mom uses them seven times.
I Resemble That Remark: Quico has accidentally acknowledged his own idiocy several times. For example, when El Chavo suggested Quico that he should wish for him to stop being dumb, he corrects El Chavo by stating he cannot wish for impossibles.
Dub Name Change: In Brazil, he's known as "Seu Madruga"(Which means either Midnight or someone who sleeps late; this is implied to be a irony joke with the fact he isn't the type that works till wee hours, or because he's said to be The Alcoholic).
Forgot to Pay the Bill: Always forget to pay the rent to Senõr Barriga, although he doesn't have money to pay in most of cases.
How the Mighty Have Fallen: The reason she refuses Quico's suggestion to set up a shop when their economic situation worsens. Only Don Ramón's idea of him being the one selling (So she would only prepare the churros) convinces her into setting one up.
Hypocritical Humor: When El Chavo tells her that "men shouldn't hurt women"note As Quico was trying to do that on La Chilindrina, she says that that's when a woman earns her respect, and that there are women that take advantage of what El Chavo said to hurt men. Later, when she's about to slap Don Ramón, he reminds her of what she said, of which she says that she's one of the latter, then slaps him.
Mama Bear: She is very protective of Quico. Whenever she thinks Quico was attacked by Ramón, she slaps him.
Distracted by the Sexy: Prone to this. Becomes a plot point when El Chavo has to run over Quico's pet cat to avoid crashing into him, who was right in the middle of the street under the effects of this trope.
Insufferable Genius: He claims that he's only been wrong about something once - when he thought he was wrong about something.
He also thinks very highly of his skills, even though he's seen to be no better than Don Ramón outside of teaching. There was that time when he offered to repair one of Doña Florinda's chairs:
Profesor Jirafales: I know some carpentry...
Doña Florinda: Oh, Profesor Jirafales, I believe that you are unmatched among men!
It's All About Me: In one of his dates with Doña Florinda, he said he'd like to talk about her. He wanted to know what she thought of him; how she felt about him; and so forth.
Narcissist: When asked by Doña Florinda if he likes to talk about life's beautiful things, he says he hates talking about himself. He also says marigold flowers are fitting for his personalitynote marigolds are known in spanish as "maravillas", "wonders"
Agent Mulder: Zig-zagged in the episode Don Ramón finds out his house's plates are slowly disappearing. At first, she asks if Don Ramón was a sleepwalker, but when he denies, she brings up the idea of the "espíritus chocarreros", ghosts inhabiting his home, up to the point she held a spiritism session to prove her point. When she finds out Don Ramón was indeed a sleepwalker, she chastises herself for believing in ghosts.