You have to wait for Baoba the Warden to call you to tell you the safari zone is open.
Baboa is the owner of the safari zone.
Pikachu isn't found in the Safari Zone.
Safari Zone.
In HeartGold you can find Larvitar on Mt. Silver or in the Safari Zone (in the 'Mountain' area).Safari Zone
In HeartGold/SoulSilver you can find a Ryhorn on Victory Road or in the Safari Zone. In the Safari Zone, it's in 'savannah' areas.
You can find a Jigglypuff in the Johto Safari Zone in Pokémon HeartGold and SoulSilver in the Meadow and Swamp areas of the Safari Zone.
safari zone
Safari Zone
safari zone
The Marshland in the safari zone
safari zone
safari zone