Aliens in Disguise Rise of the Heroes by M.M. Scott

Dragonamir was like any other boy in school...on Jupiter. He had to deal with yelling teachers and mean bullies. That changed when he realized he had special powers...or did it? His skill got him recruited at a young age to the Space Academy, but there he discovers he still has to deal with bullies and worse. He and his friends accidentally awaken an ancient Evil which is intent on destroying them. They are chased across the solor system and crash on Earth. There they meet Alex, a human boy, who helps them hide from then men in black, fight the ancient Evil, and find their way home.