>>28413348I'd go with Gen 3 starting it since I like Gen 2's legendary set up of one trio, one duo, and one standalone mythical. Gen 3 could have removed the Regis and Jirachi to achieve this balance. Gen 4 is a bit more complicated since it had two plot relevant trios, but in this case, I'd keep the box legendaries since they were the end goal for Cyrus just like how Kyogre and Groudon were for Archie and Maxie respectively. For the duo, I'd keep Cresselia and Darkrai since they represent dreams and nightmares, a decent foil of each other. Lastly I'd keep Arceus for the mythical slot since he's relevant to the Time/Space/Distortion trio.