I like Orthworm a lot, I was pretty enthralled by this steel worm Pokémon. It's pretty cute and the hands on its steel core is interesting. It's the first one I think from the new generation I really liked, similar to Appletun from Generation VIII. I have one on my team for Pokémon Scarlet even.
Absolutely Mega Mawile. It looks good enough to be a regular evolution for Mawile.
What's your favorite aspect you like about Mawile?
Probably the combination of the cute front part with the giant mouth(s). That and Mega Mawile's massive attack stat.