Club Penguin Rocky and CeCe Background Bug
It looks like my possible explanation for the Ilsoap bug was right. Because Ilsoap’s penguin ID is 29 and Rocky’s mascot ID is 29, Ilsoap is listed as a mascot (gives away a background)

Because of this Ilsoap gives you Rocky and CeCe’s background.

Thanks Pjmgpablo!
please be my friend so i can get a backround Clubpenguin name: Cooljazy967