>>55854301I do honestly like
>>55854309 or maybe go super broken like Primal Groudon's sun turning off water types. Not that Reshiram has too worry about them though. Honestly it really did feel like the abilities should've tied into their "Overdrive forms" concept especially with how impressive they looked in cutscene powering up and the dex entry inferring Reshiram can alter the atmosphere just from powering up.
but also have considered something like:
Turboblaze and Terravolt now "improve effectiveness" of fire and electric. IE Fire type attacks are now x4 effective on grass, ice, etc and x8 on dual weak types. Give Kyurem one that works for Ice, or maybe Dragon type, and the combined Kyurem gets the "Two in one" ability Calyrex has.