Mine is Pokemon HGSS (the amount of content is mindboggling), Pokemon Platinum (grandest Pokemon experience) and Pokemon Black 2/White 2 (most fun and unique playthrough). I’m also looking forward to buying Legends: Arceus on the Switch, have heard many great things about it!
Haha yeah, Pokemon story really leaves much to be desired since the 3D era. I’m really excited for Arceus though! Definitely the best game on Switch right now, or arguably until those re-releases inhaling copium probably on the Switch 2 maybe? :')