Throughout the many seasons of Pokémon, Ash's pikachu has done some really weird temporary mimicry to people and Pokémon. Everyone in the anime looks at Pikachu weirdly as he does this since he seems to be the only Pokémon that can do it outside of Mew and Ditto. What are your theories behind why and how Pikachu is able to do this?
It’s anime so I’m guessing this isn’t anything too big. The again, I don’t know much about anime but I believe stuff like this happens quite often to add humor. It does look pretty comical and quite humorous.
No, Pikachu is just obeying the Rule of Funny. https://tvtropes.org/pmwiki/pmwiki.php/Main/RuleOfFunny
Pikachus have really squishy faces. And it is the anime so many impossible things are possible there.