The Safari Zone has been a staple of mainline Pokemon games since the first games released in 1998. Pokemon Brilliant Diamond and Shining Pearl continue the tradition, except the designated zone is rebranded as the Great Marsh.
The Great Marsh is similar to many previous Safari Zones, but it has its unique differences in Brilliant Diamond and Shining Pearl. The dedicated area has its own set list of Pokemon that can spawn within all 6 zones. The chances of encountering a specific character changes based on the time of day, whether the National Dex has been acquired, and a randomized potential daily encounter with one character from a binoculars sighting.
Pokemon Brilliant Diamond & Shining Pearl: Grand Underground Pokemon List
There are a total of 31 Pokemon that can be caught in the Safari Zone/Great Marsh in Brilliant Diamond and 30 in Shining Pearl, with 8 only catchable after getting the National Dex from Professor Oak after beating the Elite Four. Arbok is exclusive to Brilliant Diamond players.
Trainers will start the Great Marsh Safari Zone after buying 30 Safari Balls and entering the area. They have unlimited time to explore, but the adventure ends when every Pokeball has been thrown, or 500 steps have been reached. Trainers don't battle, but instead must use bait and lure to alter the catch/flee rate. It is highly recommended to just throw a Safari Ball without using any Bait or Lure.
There are 14 Pokemon that can only be encountered after spotting them on the lookout binoculars located on the second floor of the Safari Zone building. This character is randomized daily, and ordinary random catches have the ability to appear in the binoculars for all 6 zones as well. So, there's no guarantee a character that can only
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