Digimon World 2
Chaos Lord is the Prince of Evil, the first Digimon that became wild, and one of the Chaos series Digimon. Angemon of the Meditation Dome says that, according to the legend, Chaos Lord became wild because he came into contact with a Grand Being. Then he began attacking other Digimon, and the battling spread over the whole File Island like wild fire. Chaos Lord earned his name because of that, and also became the Prince of Evil. In addition to that, Chaos Lord was the one responsible for the people of File Island to flee from it using the Archive Ship, since they had to do so after losing to him.
Akira can not find where Chaos Lord is in the beginning. In order to do so, he must first defeat three Digimon with incredible super powers (as Jijimon of File Island says), who work under ChaosLord, and are known as the Chaos Generals. The Chaos Generals are the most powerful Wild Digimon after Chaos Lord, and each of them possesses a special item called the Chaos Ring. When the three Chaos Generals' Chaos Rings are combined, they can reveal the location of Soft Domain, where Chaos Lord is located. Akira fights and defeats the three Chaos Generals, collecting their Chaos Rings after each battle. When Akira gets all three Chaos Rings, he shows them to Jijimon, who then uses them to show Akira where the Soft Domain is.
Akira then has to go to Soft Domain and make his way to the 16th floor. There, he finds Crimson, the Blood Knights' leader, and defeats him. Crimson then leaves, informing Akira that Chaos Lord is waiting for him. Akira then has to make his way to Chaos Lord, but on his way there are some dangerous obstacles—red floor tiles (acid swamps) which can cause some damage to Akira's Digi-beetle, rendering it useless. At this point of the game, Akira does not have access to the necessary equipment to overcome those obstacles without having his Digi-beetle take damage. Therefore, he must use repairing items to fix his Digi-beetle when it takes too much damage. If he does not have such items, Akira's Digi-beetle will most likely not be able to continue any further, and Akira will have to leave Soft Domain before even having reached Chaos Lord.
When Akira overcomes the obstacles at the 16th floor of Soft Domain, he will then walk through five corridors of all Specialties (Darkness, Machine, Nature, Water, Fire), and in the end, in a large room whose floor is of no Specialty, he will find the Prince of Evil, Chaos Lord. Chaos Lord believes that he is the most powerful Digimon, and he reveals to Akira that he is planning to eliminate everyone except for himself in order to reach the peak of evolution. He states that he was even going to destroy the three Chaos Generals.
After being defeated, Chaos Lord tells Akira that he and the Chaos Generals will be revived into new forms by an item he gave to Crimson. Although Crimson himself never mentions it, it is assumed that his NeoCrimson form is a combination of himself, the Chaos Generals, but also Chaos Lord too, since he has his unique cannons and his feet.
In the end, it is revealed that Chaos Lord was a part of Overlord GAIA's evolutionary program, which would have destroyed everything had it not been stopped by Akira.
Interestingly enough, ChaosLord has 747 HP, even higher that that of Overlord GAIA, the final boss of the game. He is the character with the third highest HP in the game, surpassed only by the Guardians (who have 897 HP) and NeoCrimson (who has 825 HP).
- Chaos Cannon: Fires several energy blasts from its back cannons.
- Pulse Blast (Shaking Pulse): Dolphmon's technique in which it fires ultrasonic waves from its back cannons.