Bakugan: Battle Planet

I like bakugans but my sister noticed that some are shaped like letters in the alphabet. My sister said that one looks like a S and the other on looks like an L. It's kinda freaky and I am not wondering why are they shaped like letters. Is it some kind of code? Or they just want to have fun with the bakugan's and shape them like letter from the alphabet? People who have bakugan's check the shape of you bakugan's to see if they are shaped as letters. If you do see letters please make a comment and type which letters. To see if it's a code or not. Well that my Review /comment.