Detention (found Kids' WB! animated series; 1999-2000)
From The Lost Media Wiki
Detention was a 1999 television series that aired on Kids WB until it was cancelled in the year 2000. The show revolved around eight kids Shareena, Emmitt, Jim, Gug, Lemonjella, Orangejella, Duncan, and Shelly who would always find themselves in trouble with the school detention supervisor who acts like a drill sergeant.
Obscurity
Because the show is not well known due to it not lasting very long on television, only three of the thirteen episodes can be found on YouTube in English. However, one episode can be found in Spanish. The other nine episodes are lost and cannot be found online.