Things You'll Need
Instructions
Give your Pikachu or Raichu a Light Ball. Go to the menu, open your bag, and select the "Light Ball." Click "Give," and then select your Pikachu or Raichu. Make sure you have another Pikachu or Raichu of the opposite gender. You can also use Ditto.
Give your two Pokemon of opposite gender to the Pokemon daycare. Remember, it will need to be a Pikachu or Raichu with the Light Ball, and a Pikachu, Raichu or Ditto of the opposite gender.
Leave the daycare, and walk around until you are contacted by the daycare representative. You can speed up this process by riding around on your bike.
Return to the daycare and collect the egg. Walk around until the egg hatches. The egg contains Pichu, who possesses the Volt Tackle attack.