Route 228

16 species to catch in 1 area of this location, across 3 game versions.

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

in tall grass

Conditional slots 25 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
Sandslash	with a cartridge in slot 2: LeafGreen	23	4%
Diglett	with no cartridge in slot 2	23	4%
	with a cartridge in slot 2: Ruby	23	4%
	with a cartridge in slot 2: Sapphire	23	4%
	with a cartridge in slot 2: Emerald	23	4%
	with a cartridge in slot 2: FireRed	23	4%
	without the Poké Radar	25	1%
Dugtrio	outside a swarm	53	20%
Rhydon	in the morning	52	10%
	during the day	52	10%
	without the Poké Radar	53	10%
Trapinch	with the Poké Radar on	25	1%
Vibrava	with the Poké Radar on	53–54	20%
Cacnea	with no cartridge in slot 2	23	4%
	with a cartridge in slot 2: Ruby	23	4%
	with a cartridge in slot 2: Sapphire	23	4%
	with a cartridge in slot 2: Emerald	23	4%
	with a cartridge in slot 2: FireRed	23	4%
	without the Poké Radar	25	1%
Cacturne	outside a swarm	53	20%
	at night	52	10%
Beldum	during a swarm	53	20%
Hippowdon	in the morning	52	10%
	during the day	52	10%
	without the Poké Radar	54	10%

while surfing (Surf)

with the Good Rod

with the Old Rod

with the Super Rod

The red marker is Route 228. 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
• Pokémon League
• Landmark — lake, forest, facility
• Path between places
• Path that requires Surf

Generation IV does not store connections directly — it keeps the world as a grid, which only tells us that these places share an edge. So the adjacency is certain, the passage itself is not: a river, a rock or a height difference may separate them.