There was a moment in time when Pikachu had a very brief cameo in Conker's Bad Fur Day, beaten up by a gangster.
Dug up in an early uncut version of Conker's Bad Fur Day, the Nintendo 64 version, is a deleted scene where the poor electric mouse becomes harmed by a cigar smoking mob leader. "Gotta catch them all", he chuckles whilst Pikachu scurries away in search of Ash Ketchum. There were other scenes removed despite the 18 age rating, including an unfortunate incident involving a squirrel being operated whilst still conscious.
What do you think of Pikachu's brief role in Conker's Bad Fur Day - should it really have been cut?