6Teen (Dezasseis in Portugal e Seis Dezesseis in Brazil) is a Canadian cartoon made for Teletoon by Nelvana and Fresh TV.
In United States, it aired in Nickelodeon and Cartoon Network. In Canada, aired in Teletoon.
Bumper from 6teen (with english intro) from Panda Biggs https://www.youtube.com/watch?v=7dIjszUXq8o
Intro (in a multilanguage) of the cartoon https://www.youtube.com/watch?v=QcibsoeGkY0&t=409s at 5:56
Intro audio (fully Portuguese) of the cartoon https://www.youtube.com/watch?v=FLgyqWxEdPY