You should make an Collector edition for the collector people, where there is no limit to how many guardians you can catch, then maybe enable some kinda trade to the pvp game (still using the "when you catch a pokemon it will be same level as you if it were higher" ofc), would be awesome :-)
 "Ixtab"){kind=icon}
 "Mystic Guardians"){kind=icon}
 "Ultimate Santa Battle"){kind=icon}