On Act 3 of the Icecap Zone, become a ball at the end before you reach Robotnic and fly off a ramp onto a purple trampoline. Look up to see a large number of rings. Bounce high to find another set of rings. Go to the right to find a big ring.
Set off the first alarm on the first level of the Launch Base Zone, then wait in the middle of the alarm and perform Spin-Dash attacks on the Flybots. The value of the Flybots will gradually increase to 10,000 points as they continue to attack. Farm points and lives at this location.