okay, we make it step by step now:
1. send a poke to sleep (press wifi button on your c-gear in your game and choose a poke), wait until it snors (zzzzz coming) - everyting still in your game at your DS
2. when the poke is sleeping, login online to your global link account (
www.pokemon-gl.com) and click the yellow / orange ball. The poke which you sent to sleep should appear in the middle field of the bottom row. There you can see that a poke is sleeping.
3. click the blue ball (DW) and enter DW.
4. you should now stand in front of your DW house WITH the poke you sent to sleep.
5. go inside your house and click at the friend board on the wall
6. the Arceus should be on this board. Click it once, a pop up with Arceus moves and so on appears. Close the window again.
7. Log out the DW (click the button in the top right corner of the window)
8. Check the global link profile (orange / yellow ball)
9. Arceus should be at the right field in the bottom line
10. if it is there, then click the wifi button of your c-gear in your GAME again
11. wake up your poke (you should see how your poke flies back in the bad, together with that Arceus)
12. click the wireless button in your c-gear. Outside a house or a building only, otherwise you cannot be sent to High-Link
13. You should arrive at High-Link. Enter the High Link forest and walk through all forest areas. Arceus should be in of the last areas.
That's it.