In the Safari zone, they are pretty rare. They can be found, but they tend to flee after a few rounds. Once you find one, make sure you catch it.
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.
You can get a Larvitar from Mt. Silver or from the Safari Zone (Mountain) with 5 Peak Objects.
Yes, you can obtain a Seviper. You have to go to the Swampy Area of the Safari Zone. Then, you have to place certain types of items in that area. Eventually, you could find a Seviper, but they're rare.
No. But Sedot can be found in Emerald or Ruby versions.
dratini is in the swamp safari zone ( so iv've heard)
Dunno but sources say Larvitar are pretty common in the Safari Zone but are rare (5% to exact, I know that) at Mt. Silver.
I don't think you can. However, Larvitar can be caught in either Mt. Silver of Johto Safari Zone in HeartGold. Not sure which one though.
You can't get a larvitar in the safari zone.
In HeartGold you can find Larvitar on Mt. Silver or in the Safari Zone (in the 'Mountain' area).Safari Zone
Larvitar can be found in Mt. Silver or the Safari Zone.
Larvitar can be caught in the Mountain area during the morning and afternoon.
In Pokémon SoulSilver, you can find Larvitar in the Safari Zone and in Mt. Silver. For the Safari Zone, you can find Level 17 Larvitar in the Mountain area of the Safari Zone however if you want a Level 42 Larvitar then you have to place 5 Peak Objects in the Mountain area of the Safari Zone and it'll appear in there once you have placed the objects in there.
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.
In order to get Larvitar in Pokémon HeartGold, you have to find it and catch it in Mt. Silver or in the Safari Zone.
You can find Larvitar all over Mt. Silver and at the Day time in the Safari Zone mountain. The best Larvitar is placing 5 peak objects in the Safari Zone Mountain Zone. The Larvitar is level 42. This will evolve into Pupitar on it's next level up and into Tyranitar at level 55.
In the Safari zone or At the bottom of Mt. Silver
it isn't you have to get hoppip first