Route 48

15 species to catch in 1 area of this location, across 2 game versions.

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

in tall grass

Conditional slots 9 for 8 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
Fearow	radio off	21	10%
Gloom	radio off	22–24	20%
Growlithe	at night	25	20%
Farfetchd	in the morning	25	20%
	during the day	25	20%
Hoppip	radio off	20	10%
Plusle	radio on Hoenn Sound	20–21	20%
Minun	radio on Hoenn Sound	22–24	20%
Shinx	radio on Sinnoh Sound	20–24	40%

by headbutting trees (Headbutt)

Conditional slots 6 for 4 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
Exeggcute	common tree	15–16	10%
	rare tree	17–18	10%
Hoothoot	common tree	15–16	50%
	rare tree	17–18	50%
Spinarak	rare tree	17–18	15%
Pineco	common tree	15–16	15%