You can pull a Chao for 3,000 rings or by using a Chao search item from the daily spin. However, do not do so unless you have full energy. When you pull a Chao, a timer begins. You can only use the Chao until the timer expires, and playing with it counts towards permanently unlocking it. The level three Chaos are available for one hour; if you pull one with an empty energy meter, you have lost half the time to use it. Combine boosts and Chaos effectively. For example, a good way to stockpile of rings is use the level three Neutral Chao who collects rings and the Ring Streak boost that rewards you with extra rings for collecting every ring in a group. Combine Quick Fever and Super Time Extend with an enemy-destroying Dark Chao will help you score extra points.