Happiny is one of the rarest Pokemon to be found in Pokemon Brilliant Diamond and Shining Pearl. This Pokemon evolves into Chansey if he levels up while holding an Oval Stone in his hand during the morning or during the day. Chansey will then evolve into Blissey if your friendship level is high enough. This is where you can find Happiny so you can get Blissey later.
Before you can get Happiny, you'll first need to reach Hearthome City. It will take some time and you will first have to defeat the Gym Leaders of Ore City and Eevopolis. After defeating these Gym Leaders, take the bike path south of Eevopolis and head east to reach Hearthome City.
Once you reach Hearthome City, head east to find a hiker standing near the Route 209 sign. Talk to him to get an egg. This egg will take 10.000 steps to hatch. Fortunately, you can track your steps with the pedometer on the Poketch app. When the egg hatches, you will have a Happiny.
You can also find Happiny in the wild by going to the Trophy Garden. You cannot access the Trophy Garden until you have unlocked the national Pokedex after defeating the Elite Four.
