Pokémon Mystery Dungeon : Eon Chronicles - Oblivian

When the world is threatened by an age old device, three seemingly normal Pokémon form a team to stop the Pokémon God of Time from letting the last grains of sand fall from the top of the hourglass known as the Oblivion Clock. On a quest to collect the Darkness Cogs, our heroes go to several areas, from the frigid land known as the Sub-Zero Mountains, to the blazing heat of the Labyrinth Sands Desert, this is one story you have to read.