King Eelongo resembles a large, brown stone or mechanical Eelongo. It is obviously aged, as numerous holes have appeared over its structure, and several segments are cracked. It reappears Stage 9 of Volcano Valley, this time in a shade of purple, and slightly less cracked. Beneath all of its segements is a skeletal like spine, which must be completely revealed to destroy it.
The area will start sidescrolling as soon as the battle begins. King Eelongo will attempt to charge into the Kirbys. Several air bubbles will precede its charge, and numerous long holes on either the top or bottom of the stage can be used to take shelter. If the end of the stage catches up with the Kirbys and the shelter, and Kirbys still between the shelter and the end of the stage will be crushed. The Eelongo has five segements on both sides, two of which has already been destroyed and a few more that have been cracked. It takes two hits for each complete segment to be destroyed. After one is destroyed, it reveals an inner spine which is spiked. If the Kirbys overthrow and hit the spine, it will damage them. Into the battle, blocks will prevents the Kirbys from going into shelters and continuing along the path, and King Eelongo will pick up speed. Clam shells also appear in the shelters, which can be flicked into to reveal three air bubbles. After all the segments are destroyed, King Eelongo will be destroyed and reveal a door. It reappears in Stage 9 of Volcano Valley. Not much had changed, but blocks appear sooner, and the stage is in brown water, which saps air much quicker.
King Eelongo's name is most likely a play on the words "Eel" and "Long."