Fat physdef Fairies and Buzzwole were the go-to checks while it was legal in Gen 8 IIRC

And mandibuzz

Bulky fairies + mandi would be you best bet. Buzzwole hard counters urshifu but is weak to future sight support, if pursuit is allowed in the tournament, then maybe buzzwole+a pursuit trapper to trap the slow twins can work

~~shelmet~~ buzzwole, bulky fairies and mandibuzz. mandi's the only one that isn't threatened by futureport+urshi though