Mt. Mortar

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

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

in tall grass

Conditional slots 10 for 5 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	outside a swarm	14–16	14%
	during a swarm	16	4%
Zubat	outside a swarm	13–15	60%
	during a swarm	15	30%
Machop	outside a swarm	14	20%
	during a swarm	14	20%
Geodude	outside a swarm	14	5%
	during a swarm	14	5%
Marill	during a swarm	13–15	40%
	outside a swarm	15	1%

while surfing (Surf)

Conditional slots 5 for 3 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
Goldeen	outside a swarm	15–24	90%
	during a swarm	20	60%
Seaking	outside a swarm	20–24	10%
	during a swarm	20	10%
Marill	during a swarm	20	30%

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