I dont undestand why Cresselia is on C-Rank when she deserved B-Rank at least.
Cresselia can wall a big part of physicall threats on OU very well (drags / landorus-t /terrakion / mamoswine /loom.. ) also can wall dangerous special threats on the right conditions always such Keldeo (Cresselia +def is 3HKOed from Keldeo Hidden Power Dark iirc), Landorus which can wall super well any variant like an hard counter and LO Latios/Latias. The right condition are just Sunny Day or weatherless at least, if you paired this w/ Ninetales and Dugtrio you're so good to go. Dugtrio for example helps a lot against cores popular such CBTtar + Keldeo or something that takes advantage from this,honestly Cresselia is just very good because walls a lot of threats, Anyone knows that suns stall or balance with this mon can be pretty hard to take, because she never dies, one of the best mixed walls avalaible on OU.
Cresselia can wall a big part of physicall threats on OU very well (drags / landorus-t /terrakion / mamoswine /loom.. ) also can wall dangerous special threats on the right conditions always such Keldeo (Cresselia +def is 3HKOed from Keldeo Hidden Power Dark iirc), Landorus which can wall super well any variant like an hard counter and LO Latios/Latias. The right condition are just Sunny Day or weatherless at least, if you paired this w/ Ninetales and Dugtrio you're so good to go. Dugtrio for example helps a lot against cores popular such CBTtar + Keldeo or something that takes advantage from this,honestly Cresselia is just very good because walls a lot of threats, Anyone knows that suns stall or balance with this mon can be pretty hard to take, because she never dies, one of the best mixed walls avalaible on OU.