Infinity is an interesting number. It means it's an endless journey. This means it can't be passed though right? Nope, it's possible to pass infinity. When Luigi saw Level Ω, he suggested everyone should travel past infinity. So Stuffwell had everyone on his flying board, and they managed to do so. However, what isn't possible to pass is Absolute Infinity. This number is guaranteed the endless of endlessness.
Infinity = ∞
Absolute Infinity = Ω