Chansey evolves by Happiness, not by level. Can evolve at any level, depends on how much he/she likes you. Chansey starts with a Happiness of 140, you have to get this value over 220 for he or she to evolve. To do this, you can have him/her hold the Soothe Bell, walk with him/her in your party allot, have him/her massaged, use lots of items on him/her or level him/her up allot for further information see:
http://bulbapedia.bulbagarden.net/wiki/Happiness
Chansy evolves into blissy at lv37
They evolve on level 40
It doesn't evolve at a level, you have to trade it.
Teach Poliswine Ancient Power and it will evolve
Buizel evolve at level 26.
Torchick will evolve at level 16
it matters on their happiness, when they are happy enough you level them up and they evolve its also good to use a friend ball when catching it
Make it have high happiness and then it'll evolve.
Just give Chansey protein, zinc, calcium, hp up, carbos and level it one...
hapinny into chansy
bedew and chingling and hppiny and chansy
You just evolve it by making it hold a stone (an oval one..because of the egg thing you know..) and raising it one level during the day To evolve Chansey into Blissey, you max out Chansey's friendship and level it up.
It will evolve by happiness that means always let it fight never let it faint and soon it will evolve :)
of cpurse, just work on chanseys happines
You can get blissy by going to Pokemon mansion (i think that's what it's called) on route 212 and talk to the owner when he finally says a chansy kissed him on the cheek go to the trophy garden. Find a chansy in the grass, capture it, then evolve.
You have to evolve a Chansy by making it happy, u can do so by battling with it, feeding it Vitimans, or getting it to hold a soothe bell.
you cant... you have to make chansey evolve with high friendship. you can find chansy on rout 209 in diamond, pearl, and platinum
It is suppose to evolve at the Level of 20,but if you want it to evolve later it can evolve anything after it is at Level 20.