Interesting! All Gen 9 pokemon I never got to try.
Train: Glimmora. I'll happily use this one! Very cool alien design, interesting type, and love how weird it is in general. The move pool seems a bit limited but nothing you can't work with.
Box: Flamigo. The design is just so basic... Still, for some reason which I can't explain, I find it sort of... cute? Reminds me of the classic over-basic pokemon of the early gens in a sense. Don't get me wrong, not one of my favorites at all, but I think I could actually enjoying adding one to the party. A useful offensive type combo really helps here.
Release: Baxcalibur. I don't really enjoy using Pseudo Legends to be honest. I rarely officially ban them, but I usually allow them only if I feel the game+ruleset is very tough / I had such a bad run so far I need that extra help. And this guy isn't very appealing to when it comes to design (might change my mind, but that's my initial impression). Would rather use any of the many other Dragon pseudos.
The Gen 9 dogs! Houndstone, Mabosstiff, Dachsbun.