One of the students from Carmen's last school looks like Tootie (who was even played by Grey Griffin). She is the one surrending her lunch money to the Jock Bullies.
One of the students from Carmen's last school looks like Ron Stoppable with acne. He is the one in line surrendering his lunch money to the Jock Bullies.
One of the students from Carmen's last school looks like a more nerdy version of Sheldon. He is the one in line surrendering his lunch money to the Jock Bullies.
Manny Rivera/El Tigre, a character from another show created by Jorge R. Gutiérrez, can be seen amongst the crowd of students from Carmen's last school.