Hello there, I would like everyone's opinion to this answer so feel free to say whatever. I am building a game which is gonna be called Ages of Darkness and probably have 2.5d graphics like Pokemon(correct me if I'm wrong).It will be very open roam and have a lot of maps since It takes place in 3 stages of time. I would like to know what language is best for this, really would like if C++ would be efficient for this. Also I would like to know how I would be able to handle the graphics(eg. SDL) and a efficient way to handle the game itself.

Any Language can work it does not matter what so ever as long as you have access to graphics libraries. SDL is probably not the best choice for 2.5D. If you want to use C++ you would have much better luck doing 2.5D with SFML because it is a full hardware accelerated library with easier bindings into OpenGL if you find you need to use it later on.

Thanks, the answer I was looking for!!