Union Cave

22 species to catch in 3 areas of this location, across 5 game versions.

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

in tall grass

Conditional slots 9 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	radio off	6–8	20%
Raticate	radio off	22	10%
Zubat	radio off	5–22	30%
Golbat	radio off	22	10%
Geodude	radio off	6–8	20%
Makuhita	radio on Hoenn Sound	5–22	30%
Absol	radio on Hoenn Sound	6–22	30%
Chingling	radio on Sinnoh Sound	5–22	30%
Bronzor	radio on Sinnoh Sound	6–22	30%

while surfing (Surf)

with the Good Rod

Conditional slots 3 for 2 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
Staryu	at night	20	10%
Corsola	in the morning	20	10%
	during the day	20	10%

with the Old Rod

with the Super Rod

Conditional slots 3 for 2 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
Staryu	at night	40	30%
Corsola	in the morning	40	30%
	during the day	40	30%

static, set by the game

Conditional slots 1 for 1 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
Lapras	day of the week: Friday	20	100%

The red marker is Union Cave. 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