Hmm... how far can Kirby go? We all know he has a black hole for a mouth and a crap factory. Then in later games, he has learned to copy enemies abilities. This has went ever further. He can combine his abilities with his friends, fused two abilities together, and create a "helper" from his used ability. The anime(although, non-canon) said he was meant to take a 200-year sleep. Imagine if he had reached that point. He probably could become a god then.
Take Fire Kirby. He could probabably spread Hellfire within a 10 mile radius, summon fiery meteors(or turn Rick into one), combine other abilities into more powerful firey variations, or summon an army of Hotheads, Burning' Leos, Fire Lions, Batafires, Heat Phan Phans, That Sub-Boss from KDL2 for GB, you know what I mean.
Hmm. I could also say that same thing for Soma Cruz and Shonoa.