The Surprise Pikachu meme comes from the Pokemon anime series. Pikachu's mouth is agape, seemingly unexpectedly surprised or shocked about something. Typically, this meme format is used by adding your own text above the image describing a sequence of events that leads up to something that should NOT be surprising, nevertheless, Pikachu is surprised. This meme template is best used in that ironic sense for maximum laughter. It is also sometimes used for a crass punchline, so have fun creating your own Surprised Pikachu meme.