Chaos has now new powers, that includes being able to fire energy waves, swimming at high speeds, creating water explosions by slamming his body on water, and turning into four balls that bounce toward the player. If Chaos 4 is out of water it simply floats in the air. Chaos also can launch an extendable arm, charged by energy to the opponent as well.
The battle with Chaos 4 is fought over water. Use the lily pads to stay out of the water, and jump immediately if you slip and fall. Chaos 4 attacks if he senses you sitting in the water. Hop around the lake. Chaos 4 uses a variety of distance attacks that consist of multidirectional shock waves. When Chaos 4 stops attacking and pokes his head up, Just as the Chaos before him, Chaos 4 breaks into small pieces, then reforms. Keep out of his way until he pops up, then let him have it.
Chaos 4 is fought over water. keep Tails out of the pond as much as possible, It's Chaos 4's element. Chaos 4 attacks quickly when Tails lands. drop on a ring, but jump immediately to dodge Chaos 4's attack. Don't fly farther than you need to, and stick close to Chaos 4. Chaos 4 is temporarily vulnerable when it rises. Quickly land near it and attack. Jump clear when you hit the beast. The reforming energy balls can hurt you. It takes four hits to sink Chaos 4.
Hopefully, by the time you face Chaos 4 as Knuckles, you've seen the Chaos monster's fourth incarnation while playing as another character. Knuckles has trouble getting out of the pond if he falls in. Make quick stops on the lilypads and wait for the monster to peek up. You can land beside Chaos 4 and use Knuckles's punching attack, if you're willing to risk getting hit. Alternately, ball up and drop on the monster from above. You have to score four hits to sink the beast.
Appearance in other media
Chaos 4 first appeared in "A Chaotic Day" in Sonic X. In this media, Dr. Eggman tricked Sonic and Tails to search for a Chaos Emerald, only to drop in and steal their Chaos Emeralds. After a brief battle with Eggman's Egg Hornet, Eggman gave the two Emeralds to Chaos 2 in a nearby lake, transforming it into Chaos 4. Chaos 4 attacked Sonic and Tails with energy waves, forcing Sonic to fight back. However, because Chaos 4 was in its right element, it could evade Sonic by diving underwater and use the lake's water against him as tornadoes, and even Sonic's regular attacks did little to stop it. As Sonic and Chaos 4 went for fighting close up, Chaos 4 kept dunking Sonic, until Sonic used a strong wind to charge at Chaos 4 at full speed, damaging it enough to make it unable to reform. Upset, Eggman retrieves Chaos and fled.