Dragon Coins is an RPG and collecting game where you create a group of monsters to fight against other monsters, just like in Pokemon. The interesting thing about this game, though, is that the fighting takes place via arcade coin machines. Yes, coin machines.
The main gameplay in Dragon Coins is very similar to other games of the same genre: you have to collect monsters that you get as you win battles. These creatures can be combined to create more powerful ones or evolve to become more powerful themselves.
The rather odd combat system consists of launching coins over a platform so they're pushed to the end of the screen and 'activate' your monsters' attacks. Once this happens, your creatures will hit the enemy.
Dragon Coins is an RPG mainly focused on the collecting aspect, as there is no story, and you just have to collect all the monsters. The highlight is a battle system that, despite being strange, is really fun. The graphics are pretty good, too.