Board Thread:Questions and Answers/@comment-26233698-20140226020545/@comment-2138661-20140329180942

That's true. The episodes that I think weren't Halloween-based were; Animo Crackers (which Gutrot debuted in), Bengeance is Mine, and An American Benwolf in London (if you don't count Blitzwolfer's Omniverse debut, and Chadwick's transformation.)