Always!
WAGESLAVE
Leftovers is the go-to item for the Sub+3 Attacks set, and Life Orb is very nice when trying to go all out attacker to smash holes in the opponents team. Lum berry is also nice if you want toFreeze shock isn't that good :/ just use ice beam. If you see Chansey, just switch out or something. Scarf Kyurem-B makes a really nice revenge killer, and band kyurem-B just hits like a truck. Are there any other useful items Kyurem-B can run effectively?
Kyuubi runs the standard items for an offensively oriented pokemon, and benefits from all of them very well.
Also, has anyone here tried AV Kyuubi, or is it not worth it?