This is a code to get ARCEUS
Don't use to many codes at a time otherwise it won't work
Here is the code for pokemon diamond:
94000130 FCFF0000 B21C4D28 00000000 B0000004 00000000 E00004DC 000000EC 676D676A 3A300000 3F3C4341 4A61E709 EB6825BE C560BDF7 0E165D80 ED4AF47D E2FA47F7 17021A70 D9D1F285 1F4E0471 7678C2DA EB0B3594 12088639 9E12998B 11314651 A67265B0 883DE3B6 0E752D3F FC66E0E2 87DE640F DD11A789 FABB4187 F46A1B75 28B221D7 D91CBEEB 57E3253A 19300383 405C7EB8 4E6D13FE 6028BC87 FEEC05AD F2627CFC EAA74513 4D59491B E49453F4 056AC786 B9ADDAB3 8438FE53 1D241716 CEFA71BC 1BCF75DF E16C38BE FB12D5B2 1F4F6F89 6E166680 638867EE BE01D7DF EA6B8232 C7E4CFF9 9C3BBF24 F4D6DDC6 7BF15F71 90605A7D 3E3C2436 211BEE47 4CC804D7 A797AC35 00000000 D2000000 00000000
Paste that into your cheat codes thing.
Press L+R to activate.
Here is pearl:
94000130 FCFF0000 B21C4D28 00000000 B0000004 00000000 E00004DC 000000EC 676D676A 3A300000 3F3C4341 4A61E709 EB6825BE C560BDF7 0E165D80 ED4AF47D E2FA47F7 17021A70 D9D1F285 1F4E0471 7678C2DA EB0B3594 12088639 9E12998B 11314651 A67265B0 883DE3B6 0E752D3F FC66E0E2 87DE640F DD11A789 FABB4187 F46A1B75 28B221D7 D91CBEEB 57E3253A 19300383 405C7EB8 4E6D13FE 6028BC87 FEEC05AD F2627CFC EAA74513 4D59491B E49453F4 056AC786 B9ADDAB3 8438FE53 1D241716 CEFA71BC 1BCF75DF E16C38BE FB12D5B2 1F4F6F89 6E166680 638867EE BE01D7DF EA6B8232 C7E4CFF9 9C3BBF24 F4D6DDC6 7BF15F71 90605A7D 3E3C2436 211BEE47 4CC804D7 A797AC35 00000000 D2000000 00000000
Again,Press L+R to activate.
Sorry,But i only have Diamond And Pearl Codes.