I am not sure what kinds we have, the cards are somewhere at the bottom of the toy box. I looked closely at dd's and one does have silver claws that could look like bullets, if you knew what to look for and wanted them to look like bullets, that isn't something my dd is exposed to so she has never made that leap and neither did the boy I watched who was obssessed with her bakugans because he watched the show constantly. We have the smaller ones in a variety of colors including black, teal, red, tan, and blue but I don't know if they only make one of each color. My dd doesn't watch the show so she has named them things like firefly and duckwing and they are in school right now. Is it the packaging that is turning you off of them or the actual toy inside? If it is the packaging or the card would you be willing to compromise with him and get the ball but immediately throw the packaging and/or card away? Is it something you would let him spend his own money on? This is what I did with dd at first and once I saw what they were I bought her some for Christmas and birthdays. If it isn't something you want in the house I don't think you should feel guilty about that. I don't help my dd fulfill her desire to have every fad that goes through her school. If it is a longer fad, she really wants it, and not something I object to I will sometimes help her out so she doesn't feel like the odd one out, but I have found that I can generally wait these things out. Don't feel bad about saying no to this if it just doesn't fit with your family.