You need the shiny "Pikachu-colored" event Pichu, like were given out at Gamestop stores over wifi when HeartGold & SoulSilver were first released (you just walked into the store & checked for a "present" over wifi and it was there, they could be gotten with Pearl/Diam/Plat or HG/SS games). You take the event Pichu to the shrine in Ilex Forest, and the "notch-eared" aka "spiky-eared" Pichu would jump out and it would say something about "old friends," then you're asked if you want the notch-eared Pichu in your party. I believe you need to have an empty slot in your party (if not just go back and take a Pokemon out and return to the shrine). There's only one, and there's no other way to get/unlock the notch eared Pichu (without cheating).
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No, the Notched Ear Pichu cannot evolve. It also cannot be traded, or partake in Battle Frontier.
well firstly you cant do that it's impossible talk to professor elm with the knotched eared pichu in the front of your party and he will explain everything
the only way to get it now is with the action replay :(
pokemon breeder in route 210 he has pichu, happiny,pikachu
you will not get a Pokemon from pichu and raichu they will just level up but if there was even the slightest chance of a Pokemon appearing it would be a pichu or pikachu