We are almost done with movesets now that we've reached the many Generation 4 legendaries. My Uxie is EV trained in Attack and knows:
Yawn: You're foe is either going to switch out or fall asleep. U-Turn is going to be great for this.
U-Turn: Decent power, high accuracy, deals with Dark weakness, works incredible with Yawn! You're foe is probably going to send in something good against Uxie, but now you switch out while dealing damage. If I used those types of moves, Stealth Rock would be a great replacement for Fire Punch!
Zen Headbutt: Good power, decent accuracy, STAB, decent chance to cause flinching.
Fire Punch: Decent power, high accuracy, chance to burn, deals with Bug type weakness.