You make poffins at the Poffin House at Hearthome city.
go to hearthome city and go to the poffin house and start cooking with a bitter berry.
Feed your Pokemon a dry poffin
well technically its not food its poffins and you go in hearthrome city and go in the poffin house
Hearthome - The guy standing behind the poffin house he is wearing a green hat
Go to Hearthome City, find the house that has a heart on top of the door. ( Also called Pokemon Fan Center) SIGGYh83r Talk to the chairman inside (sitting on the couch) and he will give you a poffin case.
It shows how much the Pokemon is happy with you. In some Pokemon you can evolve it if it has high happiness.
Pearl and Platinum
When a Pokémon is fed a Poffin, the Poffin's effects are permanent.
feed it a sour poffin, you can get a poffin case in the Pokemon fan club.then make poffins at the poffin house.
No, there aren't. But there are Poffins. They're very similar to PokeBlocks and exclusive only to Diamond, Pearl and Platinum. You can make them in the Poffin House located in Hearthome City. You talk to the lady in there, choose your Berry you want to cook into a Poffin and stir the Poffin according to the arrows. You can cook alone or in a group. Hope this helps!
You can't, Poffins were an addition to Diamond and Pearl, much much later than Emerald.
With the happiness checker you get in the Pokemon center in etera city.