Route 133 (Japanese: １３３番水道Water Route 133) is a water route in south-central Hoenn, connecting Route 132 and Route 134. The route is dominated for most of its length by a rapid current that prohibits any controlled movement while Surfing, thus making it a westbound route only.
At its eastern terminus, Route 133 is separated into two paths by way of a large rock formation that begins on Route 132. The northern path passes two shallow islands, one containing a Big Pearl, before being separated into a pair of paths by a large island in the center of the route. The south branch leads to one of the calm water areas of the route near the shore of the beach, which is home to a Trainer, while the north path bypasses the beach to the north. The two paths merge just west of the island. Northwest of this point is another large but shallow island containing a lone Trainer and a Star Piece.
The southern-most path from Route 132 travels along the southern edge of the rock formation as it crosses the path of a pair of Trainers. West of this spot is a large, shallow island that is barren in Pokémon Ruby and Sapphire but contains a Max Revive in Emerald. Directly to the west of the landmass, the two main paths of the route converge for the first time since the western edge of Pacifidlog Town as the route flows into Route 134.
The eastern edge of a shallow island that is used to access the Sealed Chamber on Route 134 is visible in the southwest corner of the route.
Pokémon Emerald saw the addition of two Trainers to the island containing the Big Pearl.