Not very cool to assume this is an asset flip. Balloon Cart produces well-made asset packs and has been up front with their source of inspiration.
Viewing post in Legend of Zink Asset Pack comments
Listen, I could make a sheet comparison to show the actual copied frames, but I assume it's not interesting for anyone involved. I'm glad to see that, in Itch.io, you can literally "redraw" Nintendo's property and everyone are chill with it (aside from Nintendo that could strike any game with this asset in mere seconds). I can only add that it's easy to "take inspiration" when you literally take the material from sprite resources and sell it, but if everyone are cool with that who am I to judge.