You know the bicycle bridge thing well u go under that and enter the cave u go around in the cave until u find it i did that and now i have over 12 gible XD ohh and that's also the place u can get a darkrai u bring a certain Pokemon and wander around in there and u have 2 battle darkrai with that certain Pokemon (have 2 have that Pokemon or he wont show up but idk what Pokemon it is XD) and of course u have 2 u a pokeball XD
you cant he is only in pearl, diamond
Piplup is obtained as a starter in Diamond and Pearl or through trades.
Pokemon, Diamond + Pearlits gonna be Gible. The reason is this: http://www.youtube.com/watch?v=lw7FkBZTTUkWarning! spoiler!!!
trade it from soulsilver
To obtain a Gible on Pokemon Pearl and Diamond, go to the secret place at Wayward Cave, which is under the cycling bridge, just walk around till you encounter one! It's not very complexional at all.
Sorry, but Entei can not be obtained in Pokemon Diamond and Pearl itself, you must transfer it from old GBA games and use the Pal park in DP to catch him.
You have to migrate from Sapphire or Emrald.
Put Honey on a tree
Misdreavus cannot be obtained on Pokemon Diamond, so you must trade one from Pokemon Pearl.
Wayward Cave
Gible is not available in this Pokemon version in the wild. to acquire Gible, you must beat the Elite Four and transfer this Pokemon through the Poke Transfer Lab located on Route 15. You must have Gible in your PC in another Pokemon game used on a DS (Diamond, Pearl, Platinum, Heartgold or Soulsilver.) This is true for all Pokemon you want/need in previous generations.
you can either get a gible from diamond/pearl and trade it over, or the easy and how i got mine, ask for it in the GTS. hope i helped