urghhh...i think is in the shop of sunnyshore city,
(the last shop that in front of the beach)
Chat with our AI personalities
yes because they'll go straight to your poffin case and lose their effect just to raise your pokemons stats.
Pokeblock's are not in diamond instead there called poffin's, just like ruby, sapphire and emerald in the Pokemon contests you can create your own poffin using berries.
hearthome city, next to the mart, i think
Actually, it is a 99 poffin cheat. It gives you 99 poffins in your poffin case (if you have one, it can be obtained at Pokemon fan club at Hearthome), which you can feed to your Pokemon. This not only makes them like you more, but it also improves their rankings during Pokemon contests. Hope this helps!
first go to hearthome city and go to the Pokemon fan club talk to the chairman and he will give you a poffin case =p