Zangoose is only available in Games: Ruby, and Sapphire.
Sorry!
But another way is to cheat it with an action replay code
No you can't,you have to migrate it !
migrating him from ruby or sapphire!
you catch zangoose in route 208 after getting national pokedex
you cannot not EDIT (Deannalea): Zangoose can only be obtained on Route 208 or Route 210 with GBA: Ruby inserted. Unfortunately. Check this site for all Pokemon questions, i use it daily! Seriously. http://Pokemon.marriland.com/platinum/pokedex/
No only seviper
Trade it from pokemon ruby
you can't find it in Pokemon sapphire, but you can find it in Pokemon ruby. Hope this helped. :-)
you go to the top of the page and put your mouse on shop,center,more and at the bottom of the list it will say Pokemon locater click on it then go to Pokemon a-z then go to zangoose click on it then it will show a list of places you can find zangoose click one of them then look until you find a zangoose hope this helped
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
you have to transfer it to the Pal Park after you get the National Pokedex.