Sure thing. [He whistled softly, calling a Houndoom from off-camera to sit next to him with an eager, attentive look.]

So these guys are the native creatures in this world. The objective is to catch them, train alongside them, and fight with them. They all have special powers--my Olldóiteán here can breathe fire, for example.

As for why having them fight each other's such a big deal, I don't really know. They seem to enjoy it, though.