Disgusting Swamp is the fourth stage in Bamboo Island. Shadow Boxer K appears here for the first time to the player.
Battleground
The stage will spawn Duches and Metal Hippoes at a mild rate, with 3 Shadow Boxer K's appearing as a boss when the base takes enough damage.
Strategy
Use area-attacking cats like UFO Cat and Bahamut in this battle. You should be able to eliminate the Metal Hippoes and Duches quite easily with UFO Cat. Spawn Bahamut Cat once you have collected enough money to do so.
When you reach the base and your cats start attacking it, prepare for the 3 Shadow Boxers that will appear; they will tear through your UFOs. Protect Bahamut with stalling cats such as Wall and Macho so it can attack the Shadow Boxers. After defeating the Boxers, you now can attack the base with ease.
Walkthrough
The Battle Cats - Disgusting Swamp - Played by Nurse Wuffa