Well it represents the actual situation kinda; I would have placed the recurring bosses at the bottom, as they are recurring but not that relevant (like random enemies).
Chef Kawasaki should be about where the 3 main animals are (he is doing cameos just like them currently), and the "they must come back" tier is a bit generic... I mean, Adeleine and Gooey ok, but the other 3 animal friends to me are a lot less relevant than Adeleine and Gooey... even less than the Dark Matters and Marx to me, probably one time tier material (even though I love them).
About Dark Metaknight, he's been in Triple Deluxe, but I don't think we will see him again anytime soon, I would remove him completely (it was a reference to Amazing Mirror, in the next game they would probably reference another game, or simply return to Galacta Knight).
Elline and Taranza, depends on the next major Kirby game, so you're right... though, Taranza went a bit down for not appearing in Rainbow Curse (and to be honest, Magolor too), but Rainbow Curse is a spin-off so it's too early to decide.
EDIT: Also, I think that Drawcia deserves a place somewhere between the Dark Matters and Marx, for being very influent in the recent games.
Anyway, this chart represents the relevance that those characters have according to the recent games.
If we do a relevance chart about the relevance in the history of the franchise, the chart would be a lot different.
For example, I think that the 3 main animals would easily surpass Magolor (they were aslo used as main characters and blocks in Kirby star stacker and super star stacker, other than being characters in KDL2,3 and doing cameos in almost every other game after those, including the most recent ones).
But anyway, that's your chart, those are just my opinions about, I'm not saying that you should change it.
That was exactly what I was thinking! XD
But, Chef Kawasaki with Rick, Coo and Kine?
His last real appearence was in Kirby's Dream Land 3
And his last appearence was in the Sub-game from Kirby Mass Attack Kirby Quest
There's also a "Mecha Kawasaki" in Return to Dream Land, but no Real Kawasaki
The triforce (let's call them like that) even appeared as Stage hazards in Kirby Figthers
And had references in Rainbow Curse
It's like if they were to make a comeback
Chef Kawasaki had a figurine in Rainbow Curse, unlike the triforce
But he was absent from recent games so that's why he wasn't included
The recurring bosses at the bottom?
Lol, who is more relevant?
Whispy Woods or Nightmare? Kracko or Yin-Yarn?
They are bosses from the start and they are still pretty relevant to this days
Maybe Bonkers and Mr Frosty are a Stretch but I just wanted to include them
Also the Dark Matters were just a joke
I thought that calling it the "Oh man this is so edgy! tier" would be enough
They are not relevant anymore, the only reason of why they are remembered is, well, because they are edgy and dark and different from everything you'll see in a Kirby game
Everytime someone says
"Kirby is such a baby's game"
Everyone says
"Bruh, what about Dark Matter or Zero Two?"
They are fan favorites and they will forever be (because edginess)
I mean, even the wallpaper for my tablet is Zero Two XD
People will always wait for their comeback
And the same goes for Marx, he is a fan favorite and everyone is waiting him to reappear
Dark Meta Knight and Galacta Knight only had two main appearences,
Galacta Knight in Return to Dream Land was a reference to Super Star Ultra
Dark Meta Knight in Triple Deluxe was a reference to Nightmare in Dream Land
And with the inclussion of Dark Dedede it wouldn't surprise me if we get a game where we go to the mirror world one last time
Taranza had no reason to appear in Rainbow Curse, just like Dedede and Meta Knight, he probably was like...
And Drawcia?
She is sadly in the chart already
Characters or bosses who appeared one time* tier
She might have a figurine in Rainbow Curse, but that's it
It makes me sad because she is my favorite boss from the Kirby series
But I agree with you about the other three animal friends, this days they are just too obscure
I SHOULD change the chart, but I'm too lazy to do that
Also, We're seriously talking about Meta Knight's relevance?
He is, at least for me, above Bandana Dee, but below DDD
The chart placement is just because I already had Bandana Dee's render in my computer so