What are pizzas like pizza one in Shrek Superslam?

There's no pizza named "Pizza One" in Shrek Superslam. The game features a wide variety of power-ups and items, but not a specific pizza.

However, the game does have a power-up called "Pizza Power-Up." When collected, it temporarily grants the player increased speed and invulnerability, allowing them to plow through enemies and obstacles with a pizza-fueled frenzy.

It's possible you're misremembering the name or confusing it with another power-up or item from the game.