Mickey is the first default Tsum you receive after completing the tutorial the first time you play Tsum Tsum.
Mickey Mouse is the mascot and the face of Disney, so it's no surprise that he's the first Tsum you receive. As if to help you out in his own Mickey way, his Center Burst Skill will literally give you a helping hand.
Mickey Tsum, being the first Tsum you acquire, is relatively weak with a Skill Level 1. He is a Burst Skill type Tsum, whose base burst size is SS (XS for the International version) which will eliminate approximately 10 Tsums in the center.
With most Burst Skill Tsums, you'll want to wait until you're in Fever Mode to activate his skill for Fever Bonus points.
Skill Level Edit
|Skill Level||Skill Range (JP)||Skill Range (Intl.)||Skill Upgrade|