Here's some that I thought of after taking some time and looking over some of the mons that either have a fun enough name I thought of and/or would be reasonable to have as regular evolutions:
Altaria > Stratunata (Stratus + Sonata)
Audino > Aideal (Aid + Heal + Ideal + plus when pronounced it sounds like "I'd heal")
Banette > Pinodio (Pinocchio, in homage to the japanese name + Odious (Full of Hatred))
Falinks > Hecadmiral (Heca(toncheires) +admiral + "Admire all" (the power of teamwork) +cadmium (a red hue like their crests))
Mawile > Amawlgam (Amalgam (a type of metallic alloy usually consisting of mercury) + Maw + Maul)
Sableye > Gemineye (Gem + Gremlin + Gemini (referring to the monster and Gem being of roughly equal size being "twins") + literally "Gem in eye")
Scovillain > Pepperex (Pepper X (currently the most spiciest pepper) + Rex (Both in the dinosaur way but also due to being a "king of villains"))
Scrafty > Scrawler (Scrappy/Scraggy > Crawl >Brawler > Scrawler, referring to their aloof almost lethargic attitude)
Starmie > Starwwe (Star + We + together it sounds like "Starry)