does disney and nickelodeon air it too?
Yes
Teen sitcom
Children's cable channel Nickelodeon had begun its own trend of producing teen sitcoms in the late 1980s; 
where was the wizards of waverly place filmed UNANSWERABLE is it a tv ahow? Yes. American fantasy teen sitcom what is the meaning of the above mentioned sitcom? UNANSWERABLE when did such a sitcom start to broadcast? 1954 name a few channels or broadcasters that air such a sitcom? CBS, ABC
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Teen sitcom [SEP] Nickelodeon
Children's cable channel Nickelodeon had begun its own trend of producing teen sitcoms in the late 1980s; one of the earliest was the 1989–93 series "Hey Dude", which focused on a group of teenagers working at a dude ranch; the network's most popular comedy of the 1990s was "Clarissa Explains It All", running from 1991 to 1994 and starring then-unknown actress Melissa Joan Hart, which focused around Clarissa Darling, a typical teenager that faced typical teen issues and an aggravating younger brother. The series debunked a long-held belief that a children's series that centered on a female character would not be popular with boys, in fact, "Clarissa" was universally popular among children of both genders (Hart would later star in the hit sitcom "Sabrina, the Teenage Witch" which further would catapult her further into teen stardom).