Kanto Route 2/Route description/Eastern path

South of Pewter City, the route passes the northernmost of two grass patches along the path as it turns to the west. At this point, s can take one of two routes to progress south. The first option is to remain on the main path of Route 2 and travel through the gate and into Viridian Forest, a considerably long and inconvenient detour unless Trainers desire to catch. The second option, available to Trainers who possess Pokémon that know and can use outside of battle, is to remove a small shrub southeast of the grass patch to gain access to the eastern half of the route. Here, the route meets the northern terminus of Diglett's Cave, a lengthy northwest-southeast tunnel between here and the eastern edge of Vermilion City. South of the cave lies a building that plays home to a Trainer who is looking to part ways with a rare in exchange for an, except in , when he requests a  instead. Beyond another Cut-able tree, the route begins to slope downhill as it approaches a gate. Here, Trainers that have at least ten Pokémon registered as "Owned" in their Pokédex can receive from one of Professor Oak's aides.

South of the gate, the western half of the route emerges from the Forest and passes near the second grass patch on the route as it heads south. Meanwhile, the eastern half continues downhill, linking to the western path in two locations via Cut-able tree-blocked passageways before dead-ending south of the second tree. There are several items located on the ground in this clearing, including an Ether and a Parlyz Heal farther south.