Teletubbyland (sometimes spelled Teletubbie Land) is a recurring place in SMG4's bloopers where the Teletubbies live. It debuted in the eponymous Super Mario 64 Bloopers: A Trip to Teletubbie Land and then later appeared in Super Mario 64 Bloopers: ṩṩἔᾗмὄḋᾗᾄʀ 5 (WAT O O edition), Sonic the Derphog: Eggventure and SM64: ṩṩἔᾗмὄḋᾗᾄʀ 8 (150k special). They can supposedly be entered using a Warp Pipe in the castle sewage systems.
SMG4 was taken to this location as a form of torment by a jealous YouTuber who wished he could gain more subscribers than him (which was stupid).
After Mario falls into a pipe in the sewers he wound up in Teletubbyland. While there he is quickly discovered and is hunted down, until he was eventually cornered. After making up with the Teletubbies, Mario is woken up revealing it all to be a dream after he accidently choked on sewer water.
Dr. Eggman and Sonic are accidentally transported there when trying to get home. After Sonic finds out it's full of Teletubbies he wishes to go home immediately, only to find out their out of gas. So Eggman dresses up as Teletubby to try and get some gas from the petrol shop, only to get scared by seeing the first Teletubby he encounters.
The Teletubbies invade Mario's home and force him to watch their television show. Teletubbyland only appears on TV in this episode.