I wasn't aware he even was hated? Sure, skeletal dog-like animal, "unoriginal," whatnot but I think he looks neat. I guess that's opinions for you. I personally love him, he is one of my faves so far.
Seeing this thread is funny. I've not heard of any hate for a specific character, only for the general premise (or lack of) for the new game. I've never had a problem with the toys, only their lack of direction on improving core mechanisms on the game.
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RIP GhostRoaster. He's reanimated as TakeYourLemons but occasionally is resurrected from the beyond when needed.