Route 37

11 species to catch in 1 area of this location, across 5 game versions.

Data from Pokemon Gold only: exact levels and the encounter rate for each Pokémon.

in tall grass

Conditional slots 11 for 6 species — time of day, weather, radio and other switches

The game keeps these slots separate from the base ones. Condition sets exclude each other (it cannot be morning and night at once), and the source does not say whether a condition adds a slot or replaces the whole table — so we list them row by row instead of adding them to the rate on the tile.

Pokémon	Conditions	Level	Rate
Pidgey	in the morning	13–15	50%
	during the day	13–15	50%
Pidgeotto	during the day	15	5%
Growlithe	during the day	14–16	14%
	in the morning	14	10%
	at night	14	10%
Hoothoot	at night	15	20%
Spinarak	at night	13–15	35%
Stantler	during the day	15	30%
	in the morning	15	30%
	at night	15	30%

Headbutt, high-encounter tree

Headbutt, low-encounter tree

Headbutt, normal tree

The red marker is Route 37. A diagram, not a world map — distances are not to scale, but directions and connections match the game. The legend below the drawing explains each symbol.

• Route — number inside
• Sea route — Surf only
• City
• Interior — cave, forest, tower; placed next to its entrance
• Path between places
• Path that requires Surf
• Entrance to an interior — not a passage to the other side

Directions read from the map layout in the games — from how the screens connect to each other. We know them for Kanto, Johto, Hoenn and Sinnoh; in other regions you will not see this section, because we have no source for the topology.