Joy Butterfly

Joy Butterflies are blue butterflies that appear as a result of certain Kinstone fusions. There are three different joy butterflies to catch, which will each either increase Link's speed in shooting arrows, digging , and swimming.

Joy Butterflies are small and slow and therefore are easy to catch. Just walk over them and you have the butterfly.

Trivia

 * Joy Butterflies could be a reference to the fact that in The Wind Waker, Joy Pendants are shaped like butterflies.