Great Marsh

The Great Marsh is the Sinnoh Safari Zone. Separated into six areas accessible by a small train, this Safari Zone has you go around a swamp to look for various Pokémon. These areas are interconnected with various bridges

When you go in, it will cost 500 to enter and you will be given 30 Safari Balls and can only make a 500 steps before you get called back, though you can quit at any time.

As the wild encounters take place in the swamp area, if you hit an area with deep swamp, you can get pulled in and will have to move a lot to get out.

Great Marsh

Catching Pokémon

Catching Pokémon works similar to past Safari Zones in that you can't battle the Pokémon but rather have to utilise a new mechanic to catch them. This involves you using Bait or Mud to alter the capabilities of the Pokémon. Unlike the standard wild encounters outside of the Great Martsh, each Pokémon has got a chance of fleeing.

If you use Mud, the Pokémon will be less likely to flee, but may be harder to catch
If you throw Bait, the Pokémon will be more likely to flee, but easier to catch.

Great Marsh

Daily Pokémon

Each day, a special Pokémon will spawn in the Great Marsh. If you go upstairs in the main gate of the Great Marsh, you will be able to look through binoculars for 100. This will give you a look at 6 areas of the Great Marsh and will focus on a specific Pokémon in each area. It will show you the special Pokémon during this. Looking multiple times won't change the spawn and the spawn will happen even if you don't look through the binoculars

Many Pokémon such as Carnivine are exclusive to this method, and the Pokémon you can find through it increase when you obtain the National Pokédex.

Great Marsh

List of Pokémon Only Possible Through Binoculars

Golduck
Roselia
Staravia
Skorupi
Drapion
Croagunk
Toxicroak
Carnivine

List of Pokémon Only Possible Through Binoculars After the National Pokédex

Paras
Exeggcute
Kangaskhan
Yanma
Shroomish
Gulpin

List of Pokémon Flee Rates

Paras
Flee Rate
Base: 120
Percentage: 52.94%
Psyduck
Flee Rate
Base: 90
Percentage: 64.71%
Golduck
Flee Rate
Base: 60
Percentage: 76.47%
Exeggcute
Flee Rate
Base: 120
Percentage: 52.94%
Kangaskhan
Flee Rate
Base: 150
Percentage: 41.18%
Magikarp
Flee Rate
Base: 90
Percentage: 64.71%
Gyarados
Flee Rate
Base: 60
Percentage: 76.47%
Hoothoot
Flee Rate
Base: 90
Percentage: 64.71%
Noctowl
Flee Rate
Base: 60
Percentage: 76.47%
Marill
Flee Rate
Base: 60
Percentage: 76.47%
Yanma
Flee Rate
Base: 120
Percentage: 52.94%
Wooper
Flee Rate
Base: 120
Percentage: 52.94%
Quagsire
Flee Rate
Base: 60
Percentage: 76.47%
Shroomish
Flee Rate
Base: 120
Percentage: 52.94%
Azurill
Flee Rate
Base: 120
Percentage: 52.94%
Roselia
Flee Rate
Base: 60
Percentage: 76.47%
Gulpin
Flee Rate
Base: 120
Percentage: 52.94%
Carvanha
Flee Rate
Base: 90
Percentage: 64.71%
Barboach
Flee Rate
Base: 120
Percentage: 52.94%
Starly
Flee Rate
Base: 90
Percentage: 64.71%
Staravia
Flee Rate
Base: 60
Percentage: 76.47%
Bidoof
Flee Rate
Base: 90
Percentage: 64.71%
Bibarel
Flee Rate
Base: 60
Percentage: 76.47%
Budew
Flee Rate
Base: 120
Percentage: 52.94%
Skorupi
Flee Rate
Base: 120
Percentage: 52.94%
Drapion
Flee Rate
Base: 60
Percentage: 76.47%
Croagunk
Flee Rate
Base: 150
Percentage: 41.18%
Toxicroak
Flee Rate
Base: 120
Percentage: 52.94%
Carnivine
Flee Rate
Base: 60
Percentage: 76.47%