Egg Bull takes its appearance as a bull or an ox. It is mostly red, with a gray body, horns, and face. It has yellow parts on the body. The Egg Mobile is located on the back.
The Egg Bull chases the players while occasionally shooting packs of dynamite (happens when it receives enough hits. While running, the players will pass several stacked benches. The Egg Bull will either destroy these and keep running, or stop to attack the players with more dynamite packs and horizontal tornadoes which it blows from its snout. Players must jump on the benches to gain height, and then attack the cockpit positioned on the bull's head. Players can also attack from the ground if the bull lowers its head enough.
The biggest challenge in the battle is not from the Egg Bull, but from the other player. The AIs of the game put up their strongest fight in this battle. They will often leapfrog off of the other player while he/she is airborne. This causes that player to fall, while they get the hit on the boss.
The Egg Bull must be hit six times from one player in order for the battle to end.