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!
omg definitely the ORAS remakes!! How could I forget them, best plotlines arguably! I just love how villains in those games have their own redemption arcs