User blog comment:Invasor Zim 10/A new cheese episode?/@comment-115.64.183.68-20120111115952/@comment-4002575-20120204120102

I do believe that plot by the Wikia Contributor, and you'll see on the actual page (at the top) this:

"...Doofenshmirtz makes Perry his butler with his Butler-inator, and Carl is trapped by Doof while in a squirrel costume." And the contributor said:

"...expect to see a certain someone going to a squirrel convention, another becoming a butler against his own will..."