You can evolve it only through happiness. Capture a chansey, and give it 10 of zinc,protein,carbos,calcium and iron. It will surely evolve. But give it as soon as you catch it.
Just use thief on every CHANSEY you see until you get an egg.
chansey is but it can be hard to find
you get an egg in heart home city
pikachu
pay me
Chansey appears on Route 209 and the non-foggy part of Route 210. Also, after getting the National Pokedex, Chansey sometimes appears in Mr. Backlot's mansion.
Wild Chansey sometimes have lucky eggs held.
You can one either by trading, or by leveling up a Chansey
In the eterna forest. but you have to be with cheryl to catch it ( the girl who has chansey.
Chansey evolves from an Oval Stone.
you need to battle with it alot to make it happyer then it will evolve
I know one is close after the begining. the person has a Chansey