Pizza

&nbsp A pizza is an Italian type of food, consisting out of a large pie made out of dough, covered with tomato sauce and mostly cheese, but sometimes other things can be put on it like pineapple, pepperoni, mushrooms etc. Pizzas are one of the most favourite food in the world. Currently there are plenty different types of pizzas.

Teenage Mutant Ninja Turtles (1987 series)
The 1987 cartoons are, along with the comics based on them, the only TMNT universe in wich the Turtles eat pizza. In this series, the Turtles are addictly obsessed with pizza's as it is the only thing that they eat in every episode. And they are always happy when they gonna eat pizzas.

The Turtles always get their pizzas by going on the streets to a pizza parlour, dressed so no one could see that they are mutant turtles. Sometimes all four go, sometimes only one goes.

Pizzas are also the Turtles weakness. Shredder is aware of this, as many of his plans to destroy them involve pizza (like the episodes "Case of the killer pizza's", "Pizza by the shred" etc.).

In any other TMNT universe, the Turtles eat other things, mostly sushi.

Turtles Forever (2009)
At the end of Turtles Forever, the Mirage Turtles, after having encountered the 1987 Turtles and their 2003 counterparts, suggest to go eat some pizzas. Since the Mirage Turtles never ate pizza in the Original Mirage Comics, they are obviously influenced by their future 1987 successors.