Pikachu is a Pokémon known as Ash’s trusted side-kick on the show. While some Pokémon are gender neutral, there’s actually a difference between a male and female Pikachu. Can you spot the difference?
Can’t figure it out? Look at closely at their tails.
According to Pokemon Wikia, female Pikachus have a tail with an inward dent at the end, which resembles the top of a heart.
In early anime episodes and games prior to Generation IV, male and female Pikachus looked identical.