Flipper

Flipper, which 1st appeared as an unpredictable obstacle in Balloon Fight, was known to hang in mid-air and smack away you, friends, and/or foes who make any contact with its bumper balls and occasionally cause accidents to anyone. This irksome item was also in Balloon Fight VS and later debut in Super Smash Bros. Melee as a throwing item and along with Balloon Fighter a trophy. If thrown, hung in air and made useful as a difficult obstacle for Smashers trying to recover.