The Temporal Mechanism is a grayish-looking pocketwatch labeled with Roman numerals and has the Nintendo logo on its face. The second hand ticks back and forth between two seconds. You can find this treasure in the Valley of Repose, held by a Fiery Bulblax. It is located at the far side of the field near a body of water inhabited by Water Dumples. The best way to defeat the Bulblax is to lure it into the water and attack it with Blue Pikmin after petrifying it.