Route 24 (Japanese: ２４番道路Route 24) is a route in northern Kanto, connecting Cerulean City and Route 25. Most of Route 24 encompasses the Nugget Bridge (Japanese: ゴールデンボールブリッジGolden Ball Bridge), a location where five Trainers will challenge the player one by one and, upon defeating every Trainer on the bridge, a disguised Team Rocket Grunt will reward the player with a Nugget.
The actual southern terminus of the route is at the southern extent of the bridge. Route 24 follows the length of the bridge north, running parallel to an express path to the east that originates on Route 25, allowing Trainers to travel from Cerulean Cape to Cerulean City (but not vice versa) quickly.
At the northern end of the bridge, the route opens up at a virtual three-way intersection. To the west is a long, narrow strip of land that contains Route 24's lone patch of grass containing a Trainer and wild Pokémon. This location also serves as the docking platform for a water body that leads to an otherwise inaccessible portion of Route 4, as well as Cerulean Cave northwest of Cerulean.
In Generation II, the Nugget Bridge Trainers are no longer present. Instead, the challenge has moved to Route 25. Also, the grassy area along the narrow strip of land has been reduced by half, allowing the lower portion to become a grass-free docking station. The route also ends immediately after leaving the Nugget Bridge.
In Generation IV, Route 24 is nearly identical in structure to Generation III with the exception of a few minor changes. The Trainers on the Nugget Bridge are no longer present and have moved their challenge to Route 25 and the territory that Route 24 occupies is the same as Generation II. Another change is that the bridge is above the water, instead of being over land like in previous generations. There is also a tiny strip of land in front of a fence that goes along the path to the right of the bridge.
Route 24 debuted in ...But Fearow Itself, where it was revealed that Red had caught a Bellsprout. Red also tried to capture a peculiar-looking Rattata, which turned out to actually be Bill, who had accidentally fused himself with a Rattata while fixing his Pokémon Transport System.
The "I'll make you an offer you can't refuse" line said by the Team Rocket Grunt at the end of the Nugget Bridge may be a reference to a line from The Godfather.
This route and Route 25 are the two northernmost places in Kanto in Generations I, III, and VII. In Generations II and IV, the northernmost part of this route is considered part of Route 25.
The Nugget Bridge in this route is known in Generation III for the ability to obtain infinite Nuggets. If the player loses to the Team Rocket Grunt, they will be back at the Pokémon Center, with the Nugget they obtained from the Rocket grunt. However, this does not work in Generation I because the player is only given one chance to fight this Grunt. Nonetheless, this creates a mistake in Generation I: if the player loses to the Grunt, and then returns to speak with him, the Grunt speaks as if the player won.
Four of the Trainers on Nugget Bridge all say, "I did my best, I have no regrets," after the player defeats them. The second Lass on the bridge, however, says, "I did my best, so I've no regrets," instead.