find a chansey south of Solaceon Town and train it to lvl 50
in victory road there is an ace trainer that you have to battle and she has a blissey
You can one either by trading, or by leveling up a Chansey
Well, You can't you have to migrate or if u have a gameshark or some codes to unlock it.
If you are talking about the Sinnoh Pokedex, the Pokemon is Unown. If it is in the National Pokedex, I have no idea. But it should be easy to find on one of those online pokedexes.
Blissy can have more than 700hp but it has very low defense so it can take heavy damage.
evolve your chancey
59
Blissey won't evolve.
Blissey doesn't evolve!
Train a Chansey and will evolve.
happiny-chancey-blissy
the episode is called ignorance is blissy