When Mario is getting chased from the bunch of Teletubbies, a Teletubby is eating Tubby Custard, however, Mario ran towards the custard or spaghetti and ate it, this may mean Mario think the custard is real spaghetti, considering Mario is very dumb.
Teletubby Land clearly resembles Ponyville from My Little Pony: Friendship is Magic.
When Mario is exploring Teletubby Land, the song "Sunshines, Lollipops and Rainbows" is heard playing.
The Teletubbies apparently found/made weapons like crowbars pistols/handguns machine guns and a sword (that looks like a light saber).
This is the last video from SMG4 to not include a custom-made title-card.