– A satirical corrido (narrative ballad) called “El Pinche Gringo Loco” performed by Kenny’s abuela and a talking skeletal alebrije .

It seems you're referring to a specific episode or character from the animated series "South Park," which is known for its satirical and humorous take on a wide range of topics, including social issues, politics, and pop culture. The show, created by Trey Parker and Matt Stone, frequently features characters from various ethnic and social backgrounds, including Latino characters.

– Butters enthusiastically adopts Latino stereotypes (mariachi hat, fake mustache) but genuinely tries to learn Spanish, only to memorize bizarre phrases like “¿Dónde está la biblioteca?” and accidentally summoning a librarian ghost.

: While not strictly Latino, Randy (a main character and Stan's father) has been involved in several episodes that tackle issues related to Latin American culture or stereotypes. However, he's not Latino himself.

The South Park Latino episode, also known as "Trapped in the Closet" (Season 9, Episode 12), features a storyline where Cartman becomes obsessed with a new video game and Kyle struggles with his faith. However, I believe you might be referring to the character of Butters' alter ego, "Professor Latino," or more likely, Cartman's creation of a fake Latino alter ego named "Tweek" doesn't seem correct, but rather a character named "Professor Latino" isn't a thing.

There is a character called "Tweek" in the show. Tweek is actually a nervous and anxious student at South Park Elementary. Tweek's parents own a coffee shop in the town.