Just from this image, Link and Paluntena are immediately out as they exist in a fantasy time in which pizza doesn’t even exist. That leaves just Kirby and Wario, with Kirby having a high likelihood of coming across pizza at some point as Kirby is seen exploring urban cities later on in games. Kirby has also eaten many normal and modern foods. So chances are Kirby has definitely eaten pizza at some point. Wario on the other hand is a quite large guy, probably due to lots of food consumption. And his main source of attack power is his farting, now you may be wondering “how can this guy fart all the time?” Well my friends the answer is lactose intolerance. He’s clearly lactose, therefore utilizing his disability as his main source of attack. You must also remember that Wario is an Italian man, and Italians love their pizza. So there you have it.

I have canonically eaten pizza