Well the preview for 145 shows Naganadel seemingly saying goodbye, looks like it’s flying off and Ash looks sad in the next frame looking up. So looks very much like Naganadel is leaving. Incineroar seems fine tho, munching away on his food. Happy Ash won the exhibition battle, good saga for Ash
I hope you are wrong, pal. I don't want Ash losing Naganadel.
By the way, there's something weird in the pictures of the new institute where Ash is going to pass most of the time this season. I think there's a picture showing up a "teleporter room". Is that how Ash is going to travel to the old regions?