Ilex Forest

18 species to catch in 1 area 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 17 for 10 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
Caterpie	during the day	5	30%
	in the morning	5	30%
Metapod	during the day	7	20%
	in the morning	7	20%
Weedle	during the day	5	30%
	in the morning	5	30%
Kakuna	during the day	7	10%
	in the morning	7	10%
Pidgey	during the day	7	5%
	in the morning	7	5%
Oddish	at night	5–7	50%
Paras	during the day	6	4%
	in the morning	6	4%
	at night	6	4%
Venonat	at night	5	30%
Psyduck	at night	7	10%
Hoothoot	at night	7	5%

while surfing (Surf)

with the Good Rod

with the Old Rod

with the Super Rod

Headbutt, high-encounter tree

Headbutt, low-encounter tree

Headbutt, normal tree

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
Celebi	with Virtual Console save data	30	100%

The red marker is Ilex Forest. 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