NO:I have beaten,caught,traded,and evolve every Pokemon's in the game and never seen manaphy as a wild Pokemon's also Lost it.
you can trade from one of the ranger games (if you get it and beerd with a ditto (you can get ditto right below golendrod in heart gold odr soul silver) you will get a phion egg
The only way to get Manaphy without cheating or transferring is by trading for one.
to get Manaphy without cheating, you have to have Pokemon Ranger, beat a certain mission, and then somehow transfer the Manaphy egg to Diamond or Pearl.
Well you cant really get Manaphy without cheating or trading but you can find it. Go to Hearthome city and then down and you should be on Route 212. Go down until you see a house. Go in the house and go to the first room on your right. Examine the book and then you have found Manaphy
The only way to get a Manaphy is by trading it from from a copy of Diamond,Pearl,Platinum or use a cheating system, such as Action Replay,or Gameshark. Or you could get it from Pokemon ranger by getting a manaphy egg
With ans AR
There is no way, unless you got it in an event.
That is the only way to get a manaphy without cheating. once you get the egg in Pokemon Ranger then trade it to diamond/pearl/platinum and when it hatches then you have got a manaphy.
Manaphy can only be obtained through events or trading. To obtain a Manaphy, one must attend a Nintendo promotional event or trade with a trainer who already has obtained Manaphy.
Not without cheating or hacking the game.
Cheating
Not without trading or cheating.
You can't get a Phinoe without cheating since the event to obtain a Manaphy (Phinoe's parent) has passed. Of course, you could always get a friend with action replay to trade you one, since it is very easy to obtain the Manaphy Egg with an Action Replay.