In Conker's Bad Fur Day's development was going to be a joke that was similar to a Nintendo character. The joke was that it was from another Nintendo game, a main character, but they made their own version of it with a corn bag with fake eyes and a paper lightening tale. Nintendo told the developers to remove the joke and the character was actually Pikachu from Pokemon.
Did you know that Conker's Bad Fur Day didn't start off with that name. In fact, the game wasn't like that in development. Some people called it Conker's Adventure or Conker 64. But the real title was actually Twelve Tales Conker 64. After it finished its development, it was turned into a violent vulgar game about a squirrel with a hangover. It was rated "M" for mature because of the violence of the game. Did you know that Conker's Bad Fur Day was meant to have sequel called Conker's Other Bad Day. We don't know what console it was going to be for, all we know is that once again, Conker got drunk and since spending money on parties, they lock up the king in jail. And Berri would make an appearance but as a half terminator and half herself and would go after Conker. The villain was related to Mighty Poo and Berri who helps Poo a little bit in the game died.
Here is a video of Twelve Tails Conker 64: