You can get Fire Punch and Thunder Punch by going to a move re-learner this gen.
Aside from that, well three of your slots will be occupied by Dragon Claw/Dragon Dance/Extreme Speed, so you could go with Waterfall, Aqua Tail, Earthquake, Stone Edge.... the list goes on, Dragonite has about the same coverage options as every other Dragon, which is to say it's pretty good.
3DS FC: 5198-2590-6008 SilverWingedOne: "Nothing can beat the original seven hundred and twenty-one Pokemon."
This things wrecks **** up! well for me :) The reason for 240 sp def is so it can take an ice beam better along with the multiscale ability. Although maybe 30 Speed is better too.. but this covers most things that are a threat to Dragonite :) Also, Extremespeed is very good also!