2000
EGM printed a multi-page feature (complete with doctored conference pictures) that the Intellivision was going to make a comeback. The absurdity of the idea, as well as the tongue-in-cheek article, indicated this was a joke.
Oddly, there was another article in that same issue about Twelve Tales: Conker 64 becoming Conker's Bad Fur Day, taking a new direction into bathroom and profane humor; this could have been mistaken by some as the hoax, although it was in fact true.
Read more about this topic: EGM April Fools' Jokes