Animal Locations [SA1]
You can find animals for your Chao within the different levels. This page will list all the animals are found in which levels. You can find these animals inside the robots created by Dr. Eggman, and the metal capsule with the large plunger found at the end of some levels. You can only hold up to ten animals at a time, which you can see displayed at the bottom of the screen.
There will be all the animals from a specified type within certain stages, and then one animal from a secondary group, and another from the blue (random) group. The animals from the blue group appear less often than the other animals. The animals in each level stay the same regardless of which character you use!