You need to place the DS stylus over the correct Pokemon and if nothing shows up then the currently selected Pokemon does not like you. However, if one or two hearts are shown then the Pokemon does indeed like you, with one hearts being less liked than two hearts.
In Pokemon Diamond the Friendship Checker (also called the Happiness Checker) app is #6.
The friendship app or frenship checker is given to you by a girl on the first floor of the Eterna city Pokemon center.
There should a guy inside the Day Care building, sitting at a table and he'll give you the Friendship App if he's there when you talk to him.
Just go to Eterna city, and go into the Pokemon centre. Talk to some lady (i think she has green hair), and she give you the friendship checker app on your Poketch.
You can find the app in the Pokemon Center in Eterna City. Talk to one of the girls.
In Pokemon Diamond the Friendship Checker (also called the Happiness Checker) app is #6.
The friendship app or frenship checker is given to you by a girl on the first floor of the Eterna city Pokemon center.
There should a guy inside the Day Care building, sitting at a table and he'll give you the Friendship App if he's there when you talk to him.
Go to the Pokemon Centre in Eterna City and speak to the brown haired girl, she will hand you the Pokétch app "Friendship Checker".
My Little Pony: Friendship is Magic
Just go to Eterna city, and go into the Pokemon centre. Talk to some lady (i think she has green hair), and she give you the friendship checker app on your Poketch.
You just hold down a Pokemon on the app and some or no hearts would show up.
You can find the app in the Pokemon Center in Eterna City. Talk to one of the girls.
In Eterna City's Pokemon center. Talk to a woman in there and she will give you the poketch app- freindship checker.
Friendship is a universal concept.
Budew evolves when it has the highest possible friendship (two hearts get bigger on the friendship checker poketch app) and gains a level.
If you mean the app. then you will need to be at the begining when dawn tells you to choose what hand you want. You will need to choose the right-hand for the app.