Hmmm; well the Pikachu doesn't have a Ribbon.
Basically you go to GTS, seek a Pokemon (one someone wouldn't have - a Lv. 100 Female Silcoon, etc.)
Basically watch that little clock thing and once it spins eight times, turn off your DS.
But like it said, it doesn't always work and it is very risky in which your Pokemon could be gone so I would wait for a cloner.