I love conspiracy theories, i was actually thinking the same thing, or even starting a conversation in chat to see if people would be up for a conversation about this.
Im sorry, but I gotta rant real quick. The fucking Mandela effect is not real. Just because most people have a shitty memory doesnt mean were in another universe. Like, no shit he doesnt say "I am your father". It takes a couple times watching star wars to know that. But if I went up to you and said "No im your father" youd probably not know what the fuck I was talking about. The reason we remember it as "Luke I am your father" is without the characters name, the reference is lost. And not to brag, but I knew Curious George didnt have a tail, and that Pikachus tail wasnt black, and how froot loops was spelled. Does that mean Im some chosen one who remains constant throughout the universes? No, it means I have the smallest understanding of how the brain works, and how it changes things to be more in line with what we already know. Rant over, have a nice day.
EDIT: also threepio only has a silver leg in some scenes
http://www.snopes.com/2016/07/24/the-mandela-effect/
I think that the reason people think that pikachu had a black tip was because they were used to seeing the photo I just linked where his ear is covering the tip of the tail. That in turn might cause people to mistake the end of his ear for the tip of the tail. But that's just my theory. Can anyone confirm?
https://www.reddit.com/r/MandelaEffect/
also here's a BuzzFeed post
https://www.buzzfeed.com/christopherhudspeth/crazy-examples-of-the-mandela-effect-that-will-make-you-ques?utm_term=.lh5kkNmNy3#.rrK226p6eQ
I guess they all look alike right?
(Tall, bald, goofy actors that is)
EDIT: also threepio only has a silver leg in some scenes