none
The way you can get zangoose in Pokemon heartgold is in the safari zone.
Zangoose does not appear in Pokemon sapphire, but you CAN get it. To get it, you must trade Pokemon with your friend if your friend has Pokemon ruby which is the only game you can get zangoose in. Or you can just buy Pokemon ruby.
Zangoose does not evolve
Zangoose is only found in Pokemon Ruby, which means you have to trade it from Ruby or from someone who has one.
it is fast
Zangoose (pokemon)
You can't actually find Zangoose in the wild in Pokemon Sapphire, you can only find wild Sevipers. What I know you can do is trade a Pokemon for with someone who has Pokemon Ruby. A fair trade would be to trade a Seviper. To trade with other people with Ruby or Sapphire, you need a GBA Trading Cable. Then you both enter the Trade Pokemon area upstairs in any Pokemon Center and trade. Hope this helps.
you catch zangoose in route 208 after getting national pokedex
Zangoose is #335 in the national pokedex, and it is a Normal type Pokemon.
Zangoose.
zangoose
No you can't,you have to migrate it !