I could see an OO mention of Roar + Mold Breaker to beat Baton Pass in Haxorus' revamp, but, as has already been said, any set using Dragon Tail has no use over other, much bulkier Dragons.
Miep: The season finale is thirty minutes of Andrea's feet
BobbyVaporeon: is it sexy
Miep: it's veiny
Miep: and with crusty nails