Digimon World Championship is basically a digimon raising game. You set your digimon in a customized pen layout and they train themselves. Every few days you can compete in tournaments and earn awards. Every four in game years, a championship is held and you fight your way to the top.
Pros: nostalgic, you can release digimon into environments they wouldn'e normally live in(i.e. vegiemon in a volcano), you can really see how natures play in battle, a lot of tournaments, hunting them is fun for a while
Cons: not as good as dawn or dusk, you can't control them in battle, eventually a digimon will revert to a digiegg, if you don't know the requirements for evolution you could be stuck with a numemon
It kind of reminded me of the original digimon world, without the story and with more monsters to collect