plagiarism is when you intentionally take someone else's content and pass it off as your own. Read about it on Google. and I based the canon on the ORIGINAL SPRUNKi, not on Misfit Mix. I clearly stated this. If you just don't like the ship, then sit quietly and play something else
It's not plagiarism, you're right. It's your AU and you can do it.
But you said, "I based the canon on the ORIGINAL SPRUNKI." In NyankoBfLol's Original Sprunki, there's no Wenda x Gray canon either. Wenda and Gray don't even interact in the original.
In Misfit Mix, which is the canon that Xeno actually wrote for those designs, it says Partner || N/A + best friend Gray.
I don't have to shut up for pointing out the official fact. Your AU ≠ canon. My comment ≠ hate. End of story.