Gen IV Locations

Search a location with the box below to see a comprehensive table of possible Pokémon encounters in this location.

Great Marsh (Area 1)

Where?

Go through the house at the top of Pastoria City. Even though you enter at the bottom, the areas are numbered from the top left (i.e. the top left area is Area 1, the top right is Area 2, the middle left is Area 3, the middle right is Area 4, the bottom left is Area 5 and the bottom right is Area 6).

Notes

Slots seven and eight, the static 5% slots, are both replaced with the Pokémon of the day in each area (chosen randomly for each area every day out of Golduck (D/P only), Roselia, Staravia, Skorupi, Drapion, Croagunk, Toxicroak and Carnivine before getting the National Pokédex, with the possibilities of Paras, Exeggcute, Kangaskhan, Shroomish, Gulpin and Yanma (D/P only) or Kecleon (Platinum only) added after getting the National Dex).

How to read this table

The bolded horizontal headings stand for the main condition that affects the following slots; the big cells on the left side describe which circumstances must apply for the rows they span to be active. The percentages tell you the chance of a Pokémon from this slot (row) appearing for any given wild encounter, provided the condition on the left holds. Each condition (i.e. each bolded horizontal heading) always has the same number of slots actually active.

If all this confuses you, and I don't blame you, just set the conditions in the form above to what actually applies for you right now, which will hide all the inactive slots and leave only the Pokémon you're actually going to be seeing. This will also recalculate the statistics at the bottom of the table accordingly.

Walking in tall grass or a cave

ConditionRarityDiamondPearlPlatinum
-
Always 20% Wooper lv. 24 Wooper lv. 24 Wooper lv. 28
20% Bibarel lv. 25 Bibarel lv. 25 Bibarel lv. 28
Time of day
In the morning 10% Budew lv. 24 Budew lv. 24 Tropius lv. 28
10% Starly lv. 26 Starly lv. 26 Tropius lv. 30
During the day 10% Budew lv. 24 Budew lv. 24 Tropius lv. 28
10% Starly lv. 26 Starly lv. 26 Tropius lv. 30
At night 10% Hoothoot lv. 24 Hoothoot lv. 24 Noctowl lv. 28
10% Noctowl lv. 26 Noctowl lv. 26 Noctowl lv. 30
-
Always 10% Marill lv. 25 Marill lv. 25 Wooper lv. 29
10% Quagsire lv. 25 Quagsire lv. 25 Quagsire lv. 30
5% Marill lv. 26 Marill lv. 26 Wooper lv. 28
5% Quagsire lv. 26 Quagsire lv. 26 Wooper lv. 30
Gen 3 game in slot 2
No game in slot 2 4% Psyduck lv. 26 Psyduck lv. 26 Yanma lv. 30
4% Psyduck lv. 24 Psyduck lv. 24 Tangela lv. 30
Ruby in slot 2 4% Psyduck lv. 26 Psyduck lv. 26 Yanma lv. 30
4% Psyduck lv. 24 Psyduck lv. 24 Tangela lv. 30
Sapphire in slot 2 4% Psyduck lv. 26 Psyduck lv. 26 Yanma lv. 30
4% Psyduck lv. 24 Psyduck lv. 24 Tangela lv. 30
Emerald in slot 2 4% Psyduck lv. 26 Psyduck lv. 26 Yanma lv. 30
4% Psyduck lv. 24 Psyduck lv. 24 Tangela lv. 30
Firered in slot 2 4% Arbok lv. 26 Arbok lv. 26 Arbok lv. 30
4% Arbok lv. 24 Arbok lv. 24 Arbok lv. 30
Leafgreen in slot 2 4% Psyduck lv. 26 Psyduck lv. 26 Yanma lv. 30
4% Psyduck lv. 24 Psyduck lv. 24 Tangela lv. 30
-
Always 1% Bidoof lv. 26 Bidoof lv. 26 Yanma lv. 31
1% Azurill lv. 24 Azurill lv. 24 Tangela lv. 31
Statistics
Level range 24-26 24-26 28-31
Average EXP
per Pokémon		 309.5 309.5 441.13
Average effort
per 100 encounters		 92 HP
42 Attack
13 Special Attack
6 Speed
 92 HP
42 Attack
13 Special Attack
6 Speed
 100 HP
42 Attack
4 Defense
4 Speed

Fishing with an Old Rod

RarityDiamondPearlPlatinum
60% Magikarp lv. 4-6 Magikarp lv. 4-6 Magikarp lv. 3-6
30% Magikarp lv. 3-7 Magikarp lv. 3-7 Magikarp lv. 4-7
5% Magikarp lv. 5-10 Magikarp lv. 5-10 Magikarp lv. 5-10
4% Magikarp lv. 5-10 Magikarp lv. 5-10 Magikarp lv. 5-10
1% Magikarp lv. 5-10 Magikarp lv. 5-10 Magikarp lv. 5-15
Statistics
Level range 3-10 3-10 3-15
Average EXP
per Pokémon		 14.7 14.7 14.32
Average effort
per 100 encounters		 100 Speed
 100 Speed
 100 Speed

Fishing with a Good Rod

RarityDiamondPearlPlatinum
40% Magikarp lv. 15-20 Magikarp lv. 15-20 Magikarp lv. 15-20
40% Barboach lv. 15-20 Barboach lv. 15-20 Barboach lv. 15-20
15% Magikarp lv. 10-25 Magikarp lv. 10-25 Magikarp lv. 10-25
4% Gyarados lv. 15-30 Gyarados lv. 15-30 Barboach lv. 10-25
1% Gyarados lv. 15-30 Gyarados lv. 15-30 Barboach lv. 10-25
Statistics
Level range 10-30 10-30 10-25
Average EXP
per Pokémon		 153.4 153.4 130.5
Average effort
per 100 encounters		 40 HP
10 Attack
55 Speed
 40 HP
10 Attack
55 Speed
 45 HP
55 Speed

Fishing with a Super Rod

RarityDiamondPearlPlatinum
40% Whiscash lv. 30-55 Whiscash lv. 30-55 Gyarados lv. 30-55
40% Carvanha lv. 15-20 Carvanha lv. 15-20 Carvanha lv. 30-40
15% Gyarados lv. 40-55 Gyarados lv. 40-55 Whiscash lv. 20-50
4% Carvanha lv. 15-30 Carvanha lv. 15-30 Carvanha lv. 40-55
1% Carvanha lv. 15-30 Carvanha lv. 15-30 Carvanha lv. 40-55
Statistics
Level range 15-55 15-55 20-55
Average EXP
per Pokémon		 703.25 703.25 843.65
Average effort
per 100 encounters		 80 HP
75 Attack
 80 HP
75 Attack
 30 HP
125 Attack

Surfing

RarityDiamondPearlPlatinum
60% Wooper lv. 20-30 Wooper lv. 20-30 Wooper lv. 20-30
30% Marill lv. 20-30 Marill lv. 20-30 Wooper lv. 20-30
5% Quagsire lv. 20-40 Quagsire lv. 20-40 Quagsire lv. 20-40
4% Psyduck lv. 20-40 Psyduck lv. 20-40 Quagsire lv. 20-40
1% Psyduck lv. 20-40 Psyduck lv. 20-40 Quagsire lv. 20-40
Statistics
Level range 20-40 20-40 20-40
Average EXP
per Pokémon		 219.4 219.4 225.15
Average effort
per 100 encounters		 130 HP
5 Special Attack
 130 HP
5 Special Attack
 110 HP

Page last modified November 20 2025 at 17:59 UTC