(Commissioned by Beelzeboobs.)
"After several days of servicing Dexter's robots, the Genderbend Ray wore off and Johnny was back to his normal self, except not entirely. Johnny had come to love getting dressed up like a girl and getting fucked silly; so he decided to try on another one of DeeDee's outfits. While this was going on, Dexter was working on a new inter-dimensional portal only to yield the same result as before, except this time, Dexter has a sex crazed femboy Johnny to help him keep the slime monster distracted while he fixed his errors."
(Unedited version can be found here, Hentaifoundry, or Pixiv.)
SUBJECT: Johnny Test, Dexter's Laboratory