does they also have radio network?
Yes, Nick Radio was a radio network.
Nickelodeon
Nick Radio was a radio network 
is plankton from spongebob a zooplankton or phytoplankton Plankton is an intellectual planktonic copepod and Karen is a waterproof supercomputer. they are voiced by whom in spongebob squarepants? Mr. Lawrence and Jill Talley what is its role in the series? Plankton shares a rivalry with Mr. Krabs, who owns the far more profitable Krusty Krab restaurant and sells a fictional burger called the Krabby Patty. Plankton and Karen often devise schemes to steal the secret Krabby Patty recipe, but their efforts are always thwarted by Krabs and his employees. does they appear in any other shows? No, but they appeared in comic books and video games. where is the first voice actor from? He is an American. can you tell me any other show that he worked for? He is most known for his work as a writer and voice actor for the Nicktoons shows "Rocko's Modern Life" and "SpongeBob SquarePants" the second show mentioned above was created by whom? Marine science educator and animator Stephen Hillenburg this show was aired on which television network? Nickelodeon who are the main characters of this series? SpongeBob SquarePants, snail Gary,  octopus,  starfish when did the the television network mentioned above first launch? April 1, 1979 it is owned by whom? ViacomCBS does this have any specific network for kids? NickJr, Nicktoons what is name of their website? Nick.com when did it launch? October 1995
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Nickelodeon [SEP] Nick Radio
Nick Radio was a radio network that launched on September 30, 2013, in a partnership between both the network and iHeartMedia (then called Clear Channel Communications), which distributed the network mainly via its iHeartRadio web platform and mobile app. Its programming was also streamed via the Nick.com website and on New York City radio station WHTZ as a secondary HD channel. Nick Radio focused on Top 40 and pop music (geared towards the network's target audience of children and adolescents, with radio edits of some songs incorporated due to inappropriate content), along with celebrity interview features. In addition to regular on-air DJs, Nick Radio also occasionally featured guest DJ stints by popular artists as well as stars from Nickelodeon's original series.