Pokémon Diamond and Pearl/Key Items

Here is the guide to find Key Items
 * Journal - From your mother after you get pokedex.
 * Town Map - From your RIVAL after you deliver the package.
 * Old Rod - Fisherman in Route 218 entrance building.
 * Pal Pad - Oreburgh City Pokemon center (downstairs).
 * Fashion Case - Received after defeating grunts in Jubilife City.
 * Sprayduck Can - Received in Floaroma Town flower shop.
 * Works Key - Defeat the grunts in the secret garden and they leave the key.
 * Explorer Kit - Received in Eterna City, in building next to pokemon center.
 * Bicycle - Get from the Bike Shop in Eterna City after you release owner.
 * Vs. Seeker - Received after cycling road on Route 206.
 * Poffin Case - Received at the pokemon fan club in Hearthome City.
 * Good Rod - Received from Fisherman on Route 209.
 * Seal Case - Received in Solaceon Town in a house, east side of town.
 * Coin Case - Guess the right hand from the Jester in Veilstone City house.
 * SecretPotion - Received from Cynthia after the Hotel area.
 * Old Charm - Received from Cynthia after you heal the Psyducks.
 * Storage Key - Found outside the Galactic HQ in Veilstone City.
 * Galactic Key - Found in the Galactic Warehouse.
 * Poke Radar - From Prof. Rowan after you fill Sinnoh Dex.
 * Super Rod - From fisherman at the Battle Zone.