Manaphy Egg Code
Well, you guys deserve it. Give yourselves a hand. Or two.
The password is...
P8M2 -- 9D6F -- 43H7.
Happy Unlocking.
More information to unlock it can be found on Pokemon.com
EDIT: Oh, the mission is now titled Rescue the Pokemon Egg or something like that. I'm playing it right now, so I'll write a guide or something later.
1. Get the Politoed from Lyra Forest, and use it on a rock. The rock is actually a Graveler!
2. Battle the Gravelers, and win. Duh. :D
3. Keep going through until you meet the other Evil Team (I don't remember their names, so shut :D)
4. Battle the Pokemon, which are Rattatas. Capture them, because they are easy to capture.
5. Just follow the path with mushrooms. Hahaha! Super Mario Bros.
6. Battle the Zubats on the road later on.
7. Get the Swellow. :D
Basically, it's just following the mushrooms and battling Pokemon, so I'll let you deal with the rest.
EDIT:
8. After you've repeated going around in a circle, use Swellow on the Big Mushroom. :(
I'll update a bit more, if no one closes it :(
Final Boss is Two Scythers and a Venusaur. :( (How utterly impossible.)