Characters that shouldn't be Limited Time
Mindy should be limited time, IMO. One time, unimportant characters are epitome of limited time. In addition to what you listed, the Grumple, the Yes Guy, and Mr Costington could easily be permanen...
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I really feel bad for everyone who sees Kodos and Kang in his neighbours' Springfields and will have to wait for another 8 months to get a chance to get them (if he's lucky). Also, Maude Flanders' Ghost is a character that seems essential enough (and I still hope we're getting an Actual Maude Flanders Skin alongside the expectable re-release of her Ghost this Halloween).
