The Who Is That Pokémon? meme stems from the iconic commercial break interstitial of the original Pokémon animated series. It featured a silhouette of a Pokémon that viewers had to guess before the answer was revealed after the break. The meme format evolved to feature silhouettes that look like one thing but are revealed to be something completely different or nonsensical—most famously the 'It's Pikachu!' viral video where the character is actually revealed to be Clefairy. Today, it is a staple of bait-and-switch humor, used to subvert expectations or highlight funny similarities between silhouettes and unrelated objects.