Manaphy egg:

94000130 FCFF0000
B21C4D28 00000000
B0000004 00000000
0000AA3C EDB88320
2000AA68 00000007
D2000000 00000000

Just activate the code, start the game, go into any Pokemart(I think you have to hold L+R), and the guy in the green suit should be there, talk to him and he'll give you the egg, take a few thousand steps and it will hatch.(breed it with ditto to get phione)
Darkrai Event:

94000130 fcff0000
b21c4d28 00000000
b0000004 00000000
0000aa3c EDB88320
2000aa68 00000008
d2000000 00000000

First You'll get the Membership card to enter the old Inn in Canalave city (If that wont work just walk through the Inn's Front door)

 

Shaymin event:

You dont really need a code! Use the walk anywhere cheat and Go to route 224. Walk up to that rock and then turn right and walk up, you'll notice a Half-Cliff thing with Shaymin on it. He'll walk away, but You need to Chase it! Follow it across the Seabreak path to Flower Paradise(I recommend Using the bike!)

 

Arceus Event:

 

94000130 FCFF0000 B21C4D28 00000000 B0000004 00000000 0000AA3C EDB88320 2000AA68 0000000A D2000000 00000000

Go Back to Mt.Coronet and step on the Flute Plate on the ground and Play the Azure flute. WARNING!!! Wild at level 80!!!!

 

 

Wild Pokemon Modifier:

94000130 FDFF0000 B21C4D28 00000000 B0000004 00000000 94000130 FEFF0000 00000890 01ED0001 D0000000 00000000 DA000000 00000892 DC000000 00024620 C0000000 0000000B D7000000 00000000 DC000000 00000006 D2000000 00000000

Hold L&R and In your ITEMS pocket there will be 493 Masterballs. Toss how many needed to get your Pokemon. (I.E. 493-1= 492 to get Shaymin) With that done, go into the grass, hold L, and Run into a wild Pokemon. In this case it would be a Shaymin! Oh! And Hold L+R to get ARCEUS.

 

Lv.99 wild Pokemon (These codes work good together!)

94000130 fcfe0200 02066db8 47084900 02066dbc 02000001 d2000000 00000000 94000130 fcfe0100 02066db8 95019000 02066dbc 90022000 d2000000 00000000 62000000 95019000 e2000000 0000004c 95019000 90022000 1c28b40d f0684907 1c01fd4d 2901bc0d 4902d101 49024708 00004708 02066dc1 02066d9f 00000000 95019000 69384a04 98046010 4b019a09 00004718 02064ed1 0200002c 00000000 d2000000 00000000 40510c24 20074061 04244041 940d430c 21001c28 f4c3aa0d 4801ff4f 46c04700 0206ebb1 000002e0 021c6588 00000000 94000130 FCFF0000 B21C4D28 00000000 B0000004 00000000 0000AA3C EDB88320 2000AA68 0000000A D2000000 00000000 modifier 94000130 FDFF0000 B21C4D28 00000000 B0000004 00000000 94000130 FEFF0000 00000890 01ED0001 D0000000 00000000 DA000000 00000892 DC000000 00024620 C0000000 0000000B D7000000 00000000 DC000000 00000006 D2000000 00000000

 

TRU Regigigas: *

94000130 FCFF0000
B21C4D28 00000000
B0000004 00000000
E000D2D8 00000088
20365E84 97980000
6222073F A580C657
A58497A1 B2344B66
AAC7F78C DA975BA2
F6D3CB2F 31A806FC
74172AE7 2CFB4998
0FEB80B3 9127C942
9DC009D2 2B0D0A78
986E7F63 EE9DE961
3282648C 1EA60CBC
01BDC897 339F0151
E76BCEED FBFB9E2C
BBC43CD1 65E09131
7DBC0731 3AF312D8
A099A24D 869660DE
73AE1B7A 7C92E6E6
25EDFF0B 08B257AD
D2000000 00000000
*A TRU Regigigas is a Pokemon you trade over to Pokemon Platinum to get the other Regis wild in sinnoh, but in Platinum. TRU stands for "Toys 'R' Us" Cuz that's where they come from.

 

Pokedex complete:

94000130 FCFF0000
B21C4D28 00000000
B0000004 00000000
20001681 00000001
E000154C 00000124
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF 00001FFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFFFFF
FFFFFFFF 00001FFF
70000000 00000000
00000000 08050000
00000000 00000000
00000000 00032000
00000000 02000000
00000000 08000000
80000000 00800000
20000000 00000080
7FFFFFFF FFFFFFFC
FFFFFFFF 7FFFF9FF
FFFFFFFF FFFFFFFF
FFFFFFFF FFFFE7FF
FFFFFFFF FEFFFFFF
FFFFFFFF EFFFFFFF
DFFFFFFF FFFFFFFF
FBFFFFFF 00FFFFFF
00000000 00000000
03020100 07060504
0B0A0908 0F0E0D0C
13121110 17161514
1B1A1918 00000000
D2000000 00000000