i´ve played the gamaboy advance....
i´ve played the gamaboy advance version of castlevania, the circle of allom.
its pretty good, kinda mix - snes graphics and gamaplay remember symphony...
u have special itens that let u double jump, run faster and others.
u play with richard belmont again, and has something new, some cards, and depending on the macth u do, your whip turns to fire, u get stronger...
looks great, but of course its smaller and a little bit easier that symphony, but its ok for a handheld