Still can't get over bug in the E4
I believe Fairy might get it. But I couldn't really make any guesses at this point tbh.
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Someone did some cals and Solgaleo's base HP is somewhere between 105 and 152 (152 if no investment in IVs or EVs, and 105 if maxed in both). Apparently, the lowest it could KO Salamence with would be 100 base attack with a 130 BP move; but IDK.