User blog comment:Magma MK-II/Patrick Star: The Discussion/@comment-27560932-20150329014934/@comment-27560932-20150329020311

Negative continuity. Really, nothing's canon. That little bit was no more than a joke that people take far too seriously.

Regardless, Patrick has had several delibrately villainous roles, pre-movie and post-movie, so I say keep.