1) Hydreigon, Garchomp and Metagross.
Huh, then you're in luck, because I've chosen one of those three for my next Resplendentification~
Which one, though, is gonna have to be revealed with time and time alone.

I've finished 19 and have 37 left to do, including a three-stage pseudo-legendary line you've mentioned. That would total a batch of 56, which means seven Pokémon from each Generation that isn't Generation IX.
1. Most ridiculous work names you've seen? (Max: 5)
2. Funniest reference you've seen an Aeonian sockpuppet make?