You better hurry! It will end February 14, 2010. I got mine already. It unlocks a special event in Pokemon Heart Gold/Soul Silver. It is the only way to get the Spiky Eared Pichu. You need to be in a GameStop store. And then run the wi-fi. You must be in gamestop.
Hope it answers your question!
You have to have a special (Wifi event) Pichu, bring it to the Ilex Forest Shrine. Otherwise, breed Pikachu/Raichu.
You must obtain a special pichu from a Nintendo Event. With the Nintendo Pichu event pichu you go to Ilex Forrest with it as your first Pokemon. Walk up to the shrine and the event will take place. You will leave the Forrest with the spiky eared pichu and your original pichu!
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).
you get it from an event over wifi (this event has ended)
Nonononononononononono. before HG and SS came out, there was a special event at game stop that gave it to you. It then later turned into a wifi event. Unfortunately, that event is over. I am so sorry. :(
One way to get the shiny pichu is by using gts go to your wifi settings set auto obtain DNS to no and put these numbers in the primary DNS, 72 232 228 110, leave the secondary DNS empty. After that the first thing that will happen when you connect to gts is you get the shiny pichu. Then it will say there was a communication error.
You can trade over the shiny dogs to Black or white and get it in game after the elite four. The wifi event for it is over a month away.
Wifi Event but its over now
By a Wifi Event, but its already over.
You can get pikachu-coloured pichu between March 5th 2010 and March 25th 2010.(wifi event)You can get a jirachi right now at gamestop it started Feb. 27 and lasts until March 13
either by cheating or a wifi event (but wifi event expired)
You have to get the Azule Flute over Wifi during an event.