After a while of raising your newly hatched Chao, it will eventually go into a cocoon after about an hour (this can be less if you have fed the Chao a lot of coconuts). This is called the first evolution. Your Chao is evolving from a child to an adult! A Chao is considered to be a child until it evolves.
Chao can evolve into five different ability types. In addition to this, there is a special evolution, which is separately explained on the Chaos Chao page.
Please keep in mind that a chao will evolve into the ability type that it favours most at the very point it enters its cocoon. You can therefore choose how you want it to evolve by choosing what animals (and by extension stats) the Chao is given.
Depending on what animals you have given your Chao, it will evolve in a certain way. What it evolves into depends on the different groups of animals that exist; it will evolve into one of five different ability types. These ability types are Swim, Fly, Run, Power, and Normal.
It is very commonly believed that a Chao evolves into the Swim, Fly, Run, or Power types if the corresponding stat is the highest, and that the Normal type is based on HP or a balance between the other four stats. All of this is completely false! Evolution is more complicated than that, and actually is not based on stat values at all. Instead, it is based on a Chao's recent interaction with animals.
A Chao evolves into a Normal type if it has recently interacted with animals in a balanced way. Here are two examples to help explain this:
- You give your Chao 100 Run animals, then 100 Power animals, then 100 Fly animals, and then 100 Swim animals. You have given it an equal amount of every type, but only over a long period. Most recently, you have only given it a large amount of Swim animals. The Chao will evolve into the Swim type.
- You give your Chao 5 Run animals, then 5 Power animals, then 5 Fly animals, and then 5 Swim animals. You repeat this process 20 times, so that it has had a total of 100 of each kind. Because the Chao most recently interacted with a balance of all types, it will evolve into the Normal type.
The above explanation was just a summary of how it works. For more in-depth information on this, see the Gradual Evolution page.
Chao First Evolutions
|Before Evolution||After Evolution||Ability Type||Nickname||Description|
|Normal||None||This looks just like a normal newborn Chao, except it has green highlights instead of yellow ones. Its body is also a different shade of blue, and it has a patch on its stomach. It also has a sandy-brown ball floating above its head.|
|Swim||None||This Chao has a green and yellow body, with dark green highlights on its forehead. It also has a green ball floating above its head.|
|Fly||(Basic) NiGHTS Chao||This Chao has a pinkish purple body, with sandy-brown highlights on its stomach and feet. It has large, beautiful green-blue wings, and two long, curving spikes with violet highlights emerging from the back sides of its head like a jester hat. It also has a tangerine-coloured ball floating above its head. This Chao resembles the Sega character called NiGHTS, from NiGHTS into Dreams.|
|Run||(Basic) Sonic Chao||This Chao has a green body, with dark green highlights on its head. It has big feet and three large spikes on the back of its head. It also has a light green ball floating above its head. The shape of this Chao resembles Sonic the Hedgehog.|
|Power||None||This Chao has an orange body, with red highlights on its stomach and yellow highlights on its head, hands, and feet. It has three spikes emerging upwards from its head. It also has a sandy-brown ball floating above its head.|