This is a deck case I made for my deck in Bakugan Battle Planet. The case is capable of holding 3 Bakugan, 22 Bakucores, and 50-60 Cards (w/ sleeves). When assembling this case, you may need a rubber mallet just in case the insides don't fit well. I can update and fix if any problem arises. Hope you enjoy Brawlers.
One of the case has handles to add a shoulder strap. All of the cases have holes to add small magnets to help close the case. Here is a good link for some:
EDIT: I wanted to suggest one thing. If you want to attach the hinge together, you may need to heat treat the hinge first. What I decided to do was get a bowl of boiling water, let the hinge get a little weak, and slide it onto the rod. A heat gun would work too.