The name Rooney is play on "kangaroo," and also may be a reference to the boxer Kevin Rooney. Similarly, his Japanese name, "Mike", may be a reference to the boxer Mike Tyson (as featured in Nintendo's Punch Out).
His catchphrase, "punches," is in reference to the "boxing" nature in which kangaroo jacks fight, and possibly the resulting Australian icon, "the boxing kangaroo".
Rooney is a light blue kangaroo. He has a black nose, downturned green eyes, and reddish brown hair. His paws are red (possibly to represent boxing gloves), and his feet are black. His belly and the insides of his ears are yellow. He has eyebrows that are at an angle, making him look angry or annoyed. Due to his "sporty" appearance, one may mistake him for a jock villager. He initially wears a Black Track Jacket.
Below is a brief description of the cranky personality. For more information, click here.
Cranky villagers will usually appear in a grouchy or agitated mood and are more difficult to befriend than most other villager types. When talking to the player, cranky villagers tend to become angry if the player disagrees with them or refuses to do a favor. Like all cranky villagers, Rooney will be invested in his hobby and will often challenge the player to various competitions. He will easily get along with jock, snooty and other cranky villagers, and occasionally lazy and normal villagers as well. However, he will find it hard to socialize with peppy villagers, as they will seem overstimulated or immature. Rooney will also enjoy spreading rumors about other villagers.
Rooney's house is heavily based on a boxing gym. He has a sandbag, a speed bag and a neutral corner, adding to the boxing theme. He also owns standard gym equipment, such as a treadmill, a weight bench, an exercise bike, and a butterfly machine. Rooney also has a Cassette Player that plays K.K. Adventure. His wallpaper is the Shanty Wall and his flooring is the Modern Tile.