This was a movie I watched when I was around 6-8 years old. It was an anime type movie that was in English, Color and it was from the late 90s early 2000s. The only thing I remember is that the main character had a weapon that can turn into whatever weapon he says the name of. For example, if he wanted the weapon to be a boomerang, he would say “boomerang”, and the weapon would be a boomerang. I think he was also a prince or something who was tasked with rescuing a princess. Near the end, he used the boomerang to retrieve a rose that was given to him.