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Tall grass

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Ethan and Cyndaquil explore the tall grass on Route 29

Tall grass is a mechanic in the Pokémon core series, and the habitat for many species of wild Pokémon. By entering patches of tall grass, a wild Pokémon may appear and begin to battle the player.

Tall grass is found on most routes of the Pokémon world, with some routes containing more tall grass patches than others. If the player enters a patch of tall grass, they may randomly enter a wild Pokémon battle. People are warned to stay out of tall grass if they don't have a Pokémon, due to the possibility of being attacked by wild Pokémon.

In Generation I and Generation II, using Cut causes a map tile composed of four walkable tiles of tall grass to be cut down directly in front of the player. In Generation III, this instead erases a 3×3 area around the player. In Generation II, long grass, such as that in the National Park, would be cut down gradually, while in Generation III, it is instantaneous. From Generation IV onwards, Cut has no effect on tall grass.

Differences between games

RBY
RBY Grass.png
GSC*
GSC Grass Kanto.png
GSC*
GSC Grass Johto.png
RSE
RSE Grass.png
FRLG
FRLG Grass.png
DP
DP Grass.png
Pt
Pt Grass.png
Pokémon Platinum Shiny Patch Sprite.png
HGSS
HGSS Grass.png
BWB2W2
BW Grass Sp.png BW Grass Su.png BW Grass Au.png BW Grass Wi.png
XY
Pokémon X and Y Tall Grass.png

Technical mechanics

Determining the rate of encounter

The probability (P) of encountering a Pokémon after taking a step in an area is determined by a simple mathematical formula:

P = x / 187.5

where x is one of the values below describing how rare Pokémon are in the area.

Encounter rarity x
Very common 10
Common 8.5
Semi-rare 6.75
Rare 3.33
Very rare 1.25

Poké Radar

Main article: Poké Radar
The formula for the probability of finding a Shiny Pokémon. nc is the number of Pokémon in the chain, up to 40.

The Poké Radar is a device introduced in Generation IV that is used to seek out wild Pokémon hiding in long grass. If the Pokémon that is found is knocked out or captured in a Poké Ball, a chain will begin. These chains consist of multiple members of the same Pokémon species encountered one after another. The only catch is this: a player must not encounter any Pokémon just by walking through non-wiggling grass, only by walking into the grass that shakes. Therefore, it is recommended that Repel is used in order to ensure this and achieve a higher chain. Entering the same type of grassy patch the chain was started in that is the farthest away increases the chances of meeting the same kind of Pokémon consecutively. Long chains increase the chance of finding a Shiny Pokémon, which is indicated by the patch of grass glowing white twice rather than shaking. In Generation IV, long grass does not shake when the Poké Radar is used.

Alternative areas

050Diglett.png This section is incomplete.
Please feel free to edit this section to add missing information and complete it.
Reason: Long rustling grass; tall flowers.
Spr 1g 006.png The picture used in this picture is unsatisfactory.
Reason: long (dark) grass for spring and summer are duplicates, even though they shouldn't be
Please feel free to replace it so it conforms to Bulbapedia conventions.

Long grass

Long grass on Route 119

Some areas in the Pokémon world have larger patches of grass than usual. These patches of grass have grown longer and more widespread than the usual grass patches, hiding many different species of Pokémon. Up until Generation VI, it was impossible to ride a bicycle through this type of grass (and impossible to run through it in Generation III). Some Trainers hide in the long grass patches, concealing themselves from view and surprising the player to a battle. Long grass was introduced in Generation II, where it was found in Johto's National Park. In Generation III, it is found on Route 119 and Route 120, in Generation IV on Route 210, in Generation V, on Route 7, and in Generation VI, on Route 6 and Route 16.

In Generation V, long grass can be normal or dark, and behaves just like standard grass: normal grass can rustle, while in dark grass, double wild encounters may occur.

GSC
GSC Long Grass.png
RSE
RSE Long Grass.png
DPPt
DPPt Long Grass.png
HGSS
HGSS Long Grass.png
BWB2W2*
BW Long Grass Sp.png BW Long Grass Su.png BW Long Grass Au.png BW Long Grass Wi.png
BWB2W2*
BW Dark Long Grass Sp.png BW Dark Long Grass Su.png BW Dark Long Grass Au.png BW Dark Long Grass Wi.png

Seaweed

Patch of seaweed

Seaweed, found only in Generation III, is located underwater in Pokémon Ruby, Sapphire, and Emerald, as an underwater equivalent to tall grass on land. Seaweed can be found while using Dive on dark patches of water on Route 124 and Route 126. The chance of encountering Pokémon in seaweed is lower than that of tall grass.

RSE
RSE Seaweed.png

Dark grass

This type of grass is exclusive to Generation V. In dark grass, not only are Pokémon found usually at much higher levels than those in regular grass, but there is a chance of encountering two wild Pokémon at a time, in a Double Battle. Pokémon encountered in dark grass are often similar to those found in normal grass areas of the route, but not identical (in particular, Pokémon encountered in dark grass may be slightly more difficult to catch). Often, Pokémon which are rare in normal grass are more common in dark grass.

Patches of dark grass are typically separated from patches of normal grass. Dark grass does not rustle. There is also long dark grass, which behaves like both types of grass simultaneously.

BWB2W2*
BW Dark Grass Sp.png BW Dark Grass Su.png BW Dark Grass Au.png BW Dark Grass Wi.png
BWB2W2*
BW Dark Long Grass Sp.png BW Dark Long Grass Su.png BW Dark Long Grass Au.png BW Dark Long Grass Wi.png

Rustling grass

Main article: Phenomenon

Rustling grass is found in Generation V, in virtually any area with patches of tall grass. Occasionally, a patch of grass can be seen shaking. Entering such a patch triggers a battle with a wild Pokémon. The Pokémon found in rustling grass differ from route to route, but all areas (except Route 19) contain Audino. In most areas, it is possible to encounter in rustling grass the evolved forms of Pokémon found in regular grass. Regular tall grass has a chance to start rustling for every step the player takes. Rustling grass will stop shaking if the player enters a battle, or if they leave the area (even if that specific grass patch remains on the screen). Dark grass does not rustle.

BWB2W2
BW Rustling Grass Sp.png BW Rustling Grass Su.png BW Rustling Grass Au.png BW Rustling Grass Wi.png

Flowers

Generation VI introduces flowers as an alternate grass tile. Flowers may be found on Routes 4, 7, 8, 10, 12, 15, 16, 18, 19, 20, 21, and 22, along with the Pokémon Village, and can be yellow, red, or purple. The Pokémon that can be found in one color of flowers may be different than those found in another color or in tall grass; especially with Flabébé (whose flower generally matches which patch it is found in).

In battle

Certain moves have special effects when used in a battle on a grass tile.


Special tiles in the Pokémon games
Cave tileHoleIce tileLedgeMarsh tilePuddleSand tileSnow tile
SpinnerSoft soilTall grassTrapWarp tileWater tile
Dungeon tile

Project Games logo.png This game mechanic article is part of Project Games, a Bulbapedia project that aims to write comprehensive articles on the Pokémon games.