Old Chateau

4 species to catch in 9 areas of this location, across 3 game versions.

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

in tall grass

Conditional slots 11 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
Gastly	with no cartridge in slot 2	16	36%
Haunter	with a cartridge in slot 2: Ruby	16	36%
	with a cartridge in slot 2: Sapphire	16	36%
	with a cartridge in slot 2: Emerald	16	36%
	with a cartridge in slot 2: FireRed	16	36%
	with a cartridge in slot 2: LeafGreen	16	36%
Gengar	with a cartridge in slot 2: Ruby	16	4%
	with a cartridge in slot 2: Sapphire	16	4%
	with a cartridge in slot 2: Emerald	16	4%
	with a cartridge in slot 2: FireRed	16	4%
	with a cartridge in slot 2: LeafGreen	16	4%

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
Rotom	after obtaining the National Pokédex, at night	15	100%