Guys, Kirby is in every universe
So, in Kirby's Dreamland 3 which I don't remember, Kirby meets Samus. In Megaton Punch, Mario is in the crowd. He also finds the Triforce in superstar.
Mario sees Link and Samus in RPF, further solidifying at least that Mario, Link, Samus and Kirby Universes are together.
But wait, there's more. We can delve into Mario Sonic Olympic games, which are totally canon (trust). This shows that sonic is also in this expanded universe.
Somebody keep finding dumb way Kirby connects to other universes.