For those unaware, the Mandela Effect is the concept of false memories of the past - it takes its name from the most famous example of this, which is that many remember Nelson Mandela dying in prison in the 80s when he actually died in 2013. Usually the Mandela Effect refers to a shared false memory across a group of people.
Do you have any false memories involving Lego? Maybe you remember a set or part being released which doesn't exist, a set or figures having different features or you remember a set being released in a different year? Post your examples below, there are bound to be some given that most of us discover Lego at a young age when our memory is just developing.
I have 1 example of this: I'm sure I remember a small adventurers set (https://letsbuilditagain.com/instructions/5938/) having a feature where the skeleton pops up when the tomb is opened - I've never owned this set but I'm sure I can remember a picture of a box like this one where the skeleton is popping up from the trap door. This feature was in a studios set I think and also a Harry Potter set a few years later so maybe that's why.