Shimeji Alien

Shimeji Alien comes from a video PunMaster made called "Three and a half minutes of Baby Aliens crawling on my screen"

Mechanic
He will walk/climb around the sides of the screen, blocking your view of anything there. He'll also rarely clone himself...

Origin
He comes from a video PunMaster made called "Three and a half minutes of Baby Aliens crawling on my screen", where he was a desktop pet, similar to the Shimeji Browser Extension, that PunMaster interacted with. He could clone him or do anything with him.

Trivia

 * His mechanic is a reference to his behavior inside the extension and video.