I was just looking at that pup at a possible pup for Yugi as well for similar reasons. I was looking at the koi and the samurai and that pup has what looks like cherry blossoms and similar colors to koi. I agree with Fae that this is Yugi’s pup.
Edit:
And here are my guesses for the pup match up. I’m still going back and forth with Coalchaser, EmberWolf, Lacuna and Solloby, but I will put a guess down even though I’m still undecided about these. And honestly, I think it’s more likely all my guesses are way off, but maybe someone will see the error of my guesses and figure these out.
Bernouli - I’m not familiar with Zelda, but I have read there is a Dragon Ball Z and Zelda crossover, Breath of the Wild, and maybe that bell is actually a representation of a dragon ball, and this is a representation of a dragon or some other creature in that game

Coalchaser - this one I’m still not sure, but I will guess this one

EmberWolf - again, just guessing

Lacuna - I’m still trying to figure out your clues, so for now, I’ll guess this is yours

===>

Nadine - there was several references about your pup finding your way home, perhaps lost in another galaxy. so your pup is maybe a space traveler, and so perhaps this is your pup.
My second guess would be the pup that I think might be Lacuna’s
===>

Saikiyo - I still think this mischievous lookking pup is your based on the w’s that keep popping up. and how sneaky you can be

Solloby - another one I’m still going back and forth with, so I’m going to guess this one.

Vampiric - I’m probably wrong, but I’m still sticking to my guess of this one

Yağmur - look at previous pups where some had line edits and some didn’t, and all but one had this tail, I’m going to guess this one.
My. second guess would be the one I put down for EmberWolf 
Edit 2:
Yugi wrote:Snip
GatheringRosesInSnow wrote:-Snip-
(Goes hunting for the breadcrumb hints and ends up tossing them into the water instead to see if we get any bites)
I'm leaning towards dust-puppy for Yugi's koi legend inspired pup. I dunno, the colours just make me think patterned koi, and the pattern could be taken as scales/koi colouring, or reminiscent of the rocks at the edges of some pools where they'd be hiding under shyly...
👀
Seeing this makes me think General Chaos is onto something
and my guesses need to be re-done again!