can anyone here help me on how to make a beyblade cake...there are many such cakes posted in the gallery, can anyone who has made this cake give me a rough idea/video/step by step....thanks

Had to look that up since I had no idea what you were talking about. Looks like copyrighted characters. Unless you're making it for your family, you can't sell that without permission.

That said, I'd say an edible image or FBCT.