I fell for april-fools-jokes in german videogames-magazines.
Once, the mag "MAN!AC" wrote in the news, that the
Action Replay for SNES and MegaDrive will get a successor, named "Bloody Replay", which automatically will unlock brutal hatemessages, which were hidden by the developers of the games, like a killed Mario in Sonic 3.
The magazine "Video Games" once tried an april-fools-joke, that came boomeranging back: they wrote in spring of 1998, that Nintendo will rerelease successful N64-games for a lower price, also supporting the rumble-pak and having hi-res-graphics, thanks to the expansion-pak. I believed it and looked forward to them.
One month later, the VG wrote, that they
tried to fool their audience with that, but after publishing the issue Nintendo called them and asked, who leaked the information for the "Players Choice"-budget-rerelease of N64-games. Nintendo also corrected them, that the games will not be reworked to support rumble- or expansion-pak.