Mt. Mortar

13 species to catch in 4 areas of this location, across 5 game versions.

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

in tall grass

Conditional slots 23 for 9 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
Rattata	during the day	14	60%
	in the morning	14	60%
	at night	14	60%
Raticate	at night	15–30	48%
	during the day	14–30	28%
	in the morning	14–30	28%
Zubat	at night	13–17	100%
	during the day	13–17	95%
	in the morning	13–17	95%
Golbat	at night	13–30	44%
	during the day	13–30	38%
	in the morning	13–30	38%
Machop	during the day	14–28	55%
	in the morning	14–28	55%
Machoke	during the day	32	30%
	in the morning	32	30%
Geodude	at night	13–31	70%
	during the day	13–31	60%
	in the morning	13–31	60%
Graveler	during the day	31	30%
	in the morning	31	30%
	at night	31	30%
Marill	at night	14–28	40%

while surfing (Surf)

with the Good Rod

with the Old Rod

with the Super Rod

as a gift

The red marker is Mt. Mortar. 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