Delibird

Hustle
Physical moves do 50% more damage at the cost of 20% Accuracy. Increases wild encounter rate with higher level Pokémon.
Vital Spirit
Prevents Sleep. Increases wild encounters with higher level Pokémon.
Type Tier
Ice / Flying NU
Statistics
Min- Min Max Max+
HP
45
- 231 294 -
Atk
55
131 146 209 229
Def
45
113 126 189 207
SpA
65
149 166 229 251
SpD
45
113 126 189 207
Spe
75
167 186 249 273
Name Item Ability Nature

Choice Bander

Choice Band Hustle Naughty / Rash
Moveset EVs
~ Ice Beam / Hidden Power Ground
~ Quick Attack / Hidden Power Ground
~ Focus Punch
~ Aerial Ace
136 Atk / 136 SpA / 238 Spe

Okay, Choice Band Delibird. With near-max attack, Choice Band and Hustle, the delivery bird can do some damage. Your main attack will be Aerial Ace, as it negates the accuracy you lose from Hustle. Ice Beam is there because it gets STAB and runs off of Delibird's above average special attack. Focus Punch if you manage to predict a switch (though I don't know why they'd switch out against Delibird), Quick Attack for injured pokes/SubRevvers or EndRevvers (though watch out for its 80% accuracy), and HP Ground for Rocks and Steels who you can't get with Focus Punch. Purely hit and run, this thing isn't staying in vs. ANYTHING.

Other Options

Pity he doesn't learn Spikes anymore, he'd actually be a low-tier UU then. Rapid Spin makes him only the second Pokémon to be able to Rapid Spin and resist Spikes at the same time. Unfortunately, he can't take a hit worth crap. But it's an interesting choice for a UU Rapid Spinner. Counter is pretty lol, though if he does survive the hit and counter, you can be sure he'll kill the other Pokémon.

EVs

Give him about 240 Speed, enough to outspeed Breloom and pals. Put the rest in Attack and Special Attack, and make him Lonely, Naughty, Mild, or Rash, depending on if you want more Special Attack or Attack. Putting his defenses down isn't going to make him die any worse. If you are countering or rapid spinning, put more in HP and defenses, but don't hope for much.

Opinion

Damn you're cool, Delibird. Too bad your stats blow. Oh well, can still be used to some degree of success in the UU metagame, just predict well and you'll take out a few things if your luck with Hustle is good.

Counters

Prediction, anything that's faster than it, Shuckle. Just about everything in the game can nullify it, and as with all CBers, prediction rapes it. Please don't use it in OU matches, it'll die. Quickly.