Fairly Standart sets. Rillaboom U-turns into the steels that counter it, Magnezone traps them. Mega Scizor, Corviknight, Ferrothorn, and Kartana minus choice band sets. Magearna and Mega Mawile are also checked by zone, but they also can't swap into Rillaboom's High Horsepower, which is for the most part for Heatran, Aegislash, Zard X and Volcarona, to an extent. They do both get checked or countered by Zard Y and Volcarona, so Blissey on balance teams or a pursuit trapper can be helpful, Heattom, Zard X, Garchomp, and Pelliper also all do an effective job of checking these 2. Zard X is also effective in checking another threat to these 2 as it can effectively check Zapdos, as can Rockium Z Garchomp, however, it cannot effectively switch in in fear of HP Ice. Tangrowth is also worth a mention, however Rocky Helmet sets are checked by Zone and AV sets hate taking Banded Adamant U-turns from Rillaboom.