From the Super Mario Wiki
“It's 1:00. Time to play.”
Count Down is a large clock-like being and a member of the Smithy Gang.
Mario and his allies Mallow, Bowser, Geno, and Princess Toadstool first encounter Count Down while navigating their way through Smithy's Factory during Super Mario RPG: Legend of the Seven Stars. Count Down is one of Smithy's commanders and attacks the Mario gang with his allies, the Ding-A-Lings.
 Attack Pattern
During battle it seems Count Down is nothing more than a puppet used by the Ding-A-Lings as Count Down attacks in a continuous cycle, with the attack depending on what numbers the hands on his clock face are on.
 Names in Other Languages