Uh

Uh is a ghost who lives in a haunted house where he competes with Su to win the affections of Lah. Lah collects photographs of scared people, so the two ghosts compete to scare people that come to their house and then take the best pictures, which they give to Lah to judge in exchange for her giving a kiss on the cheek to whoever’s photo she liked best.

(Source: Sonic Wiki Zone)