Gold & Silver Route 25
East of Cerulean, a wooded cape runs out to the sea. Bill's cottage sits at the tip, where the PC's famous inventor still tinkers.
Route 25 is in Kanto. In the story you arrive from Route 24 to the west and it comes before Cerulean Gym.
ROUTE 25 MAP
Pokemon Encounters
Abra, Weepinbell, and Oddish crowd the path to Bill's house, with a rare Venomoth worth a look for collectors.
Old Rod2
Good Rod2
Super Rod3Goldeen
ITEMS
The path to Bill's house on Route 25 holds a Protein for a stronger Attack stat and a Nugget, with a Potion hidden in the grass.
Leaf Stone
Evolves a Gloom into Vileplume, a Weepinbell into Victreebel, or an Exeggcute into Exeggutor.
Protein
Raises ATTACK of one Pokemon.
Nugget
Made of pure gold. Sell high.
Potion
Restores Pokemon HP by 20.
TRAINERS
The cape to Bill's house on Route 25 is the busiest of the Cerulean-area routes, eight trainers with Cooltrainers and a Super Nerd near level 38 over a crowd of Lasses and school-kids.
Dudley
Route 25 Guide
Yes, and it's new to the series. Gold and Silver run on a real clock split into morning, day, and night, and the grass swaps species along with it. Hoothoot only turns up after dark, for instance, where the daytime route hands you Pidgey. If something won't appear, come back at a different hour.
Material for custom Poke Balls. Routes 37 and 42 and Azalea Town have trees that each drop one Apricorn a day, and Kurt in Azalea turns a color into a matching ball by the next morning. A white one becomes a Fast Ball for skittish Pokemon, a black one a Heavy Ball for heavy catches like Snorlax.