LOL! I got some of the most hilarious reviews XP! I'm going to use all the ones that I like...which is just about all of them!
Axel
Gel down his Hair
Cover the tattoos under his eyes
Tell him that Roxas hates him and laugh at him when he cries
Tell Axel the Reno is his Somebody
After that, in his sleep, dress him as Reno
Dump water on him (Yes I know I said I wasn't going to do that, but he seriously hates water...)
Tell him that after he sacrificed himself in the game, Sora still died
Ask him if he could roast some marshmallows for you (Get it? :D)
Give Axel the pet fish you actually going to give to Demyx (Originally you were getting Axel a dog, remember that!)
When he asks for some gum, give him Dentyne Mint instead of Cinnamon
Wow, THANK YOU to everyone who gave me ideas! Next is Riku, I bet there are so many ways to annoy him...Oh! All the ones that were bolded were NOT mine :3