Originally Answered: would these book ideas sell?
I appreciate your enthusiasm. I too, was very young and wanted to become a writer --- and loved Pokemon, too, but that's beside the point, and the only Pokemon around when I was a kid were the original 150, so that shows how old I really am.
No one can really predict if your ideas will "sell." In fact, no publisher would buy your ideas until you have actually written the books/stories. Sadly, the publishing industry has gone by the wayside and it's increasingly difficult to get someone to just READ your manuscript.
You sound awfully young. Don't worry just yet about selling your ideas. Instead, hone your craft, read a lot of books --- and not Pokemon books or "Twilight," but REAL works of literature to learn what makes great writing truly great. You sound old enough to understand "Catcher in the Rye" and "Fahrenheit 451" on a basic level; they're classic works of American literature and will show you how to craft interesting characters, worlds and situations (not to mention, they have great, simple dialogue.)
I am about to graduate college with a writing degree, and I can honestly tell you from the ages of 11-18 all I did was read and write for practice (in between socializing and band practice, but whatever. You get the point.)
So after you've read a ton of books and written a whole bunch, if you find yourself still interested in writing, go to college and major in literature or creative writing. Then, you may have a better chance of getting yourself published.
Can't wait? Well, you can always write the story and self publish it on Lulu, but then, I think it'll only be your friends and family buying the book. Why not practice and take the next 10 years to become a truly amazing writer if it's something you really love?