From the Super Mario Wiki
DK Cruiser is a playable stage that appears in in Mario Hoops 3-on-3. It appears as the the first court in the Flower Tourney. It is essentially a large wooden raft floating down a river with with wooden hoops on each side that have the DK logo on them. It is a fairly simple stage with the main feature being that Barrels will roll across the stage squashing players who get hit by them, thus making players lose Coins and any items they may have at the time, also bananas will be thrown onto the court occassionly.