Tangela is in the grassy area after you surf below your house. I forgot the route name. Actully, the name of the route is route 2.
Chat with our AI personalities
Only by trading it from Leafgreen/Firered.
You can catch Tangela at mt. coronet top if here is a Tangela swarm. You can go every day to your rivals sister and she says which swam there is that day. Or after beating the elite four and finishing the Sinnoh pokedex you can import it from other GameBoy Advance Pokemon games such as Emerald, LeafGreen, FireRed, etc. using Pal Park.
You can find it from Great Marsh.
tangela does not have an evolution
yes, in the Safari zone, but it's a burden to catch it