So for the VGWC I'm planning a Team that utilizes Crobat as the supporter (one of my favorite pokemon)
Its being bred in gen IV so I have acess to roost and Super Fang so yeah

Crobat w/ Mental Herb @ Inner Focus
Jolly
EVS: SP 252 HP 252 DF 4

Super Fang- this is to support my brine user so it can hit at full power
Taunt- combined with white herb I can taunt other supporters that may also run taunt
Roost- to heal damage incurred
???????-Need help with a Fourth Move

It really depends on the rest of your team. :/

In general, Brave bird/Air slash and heat wave are your best offence options, Slash for the flinch and heat wave to hit scizor/ferro and chance a burn. Supportwise you can run toxic to ruin a wall or tailwind to give your other pokes a +2 speed boost.

Ok well its teamates (that I'm willing to share) are

Crown suicune Relaxed leftovers
Brine
Air Slash
Sheer Cold - OHKO's are legal
Protect/Aqua Ring

Lighting rod Pokemon....

Wide guard pokemon.....

note its for VGWC So the crobats main purpose is to support Suicune to allow it to use high powered Brines (130 power, 100% accuracy) on foes weakened by super fang, with air slash to Improve coverage and Sheer cold to finish of the rest