A morph or no?

[Spechal]

I’m confident calling him a yellowbelly. However I would think the phantom yellow belly would be darker and more blushed.

We have a couple of hobbiests on the site who work with phantom/mystic, maybe one of them will chime in.

Me too, based on limited experiences, I think that's what drew to me Spark instead of Pastel, especially since Spark (het Puma) shows flames and lighter coloring. Headstamp is there too.