If you manage to get a Pikachu-Coloured Pichu sent into your game (via event or Wi-Fi) it will activate the Spiky-Eared Pichu event.
Simply go by Celebi's Shrine in Ilex Forest with the Pikachu-Coloured Pichu* and an empty slot in your party and a Spiky-Eared Pichu will appear. It will be at Level 30.
*Even if you have evolved thePikachu-Coloured Pichu into a Pikachu or Raichu, this special event will still work.
no
You can get a Spiky-eared Pichu in Pokémon HeartGold and SoulSilver if you get the movie-event Pikachu-colored Pichu and bring it to Celebi's Shrine in Ilex Forest in HeartGold or SoulSilver.
its impossible unless you trade it from heartgold or soulsilver after the Wi- Fi event
The difference is that the pikachu-colored pichu is the event pichu forDPPt, whereas the notched ear pichu is the pichu that joins your party one you transfer it to HeartGold or SoulSilver (In the Ilya forest).
You must transfer (or trade) the event Pikachu-Colored Pichu into Pokemon Heartgold or Soulsilver. Then take it in the front of your party to the shrine in the Ilex forest with an empty party space. The awesome spiky-eared pichu will join your party and it will be at level 30.
no
Yes, you can catch the Spiky-eared Pichu in the English versions of Pokémon HeartGold and SoulSilver however you need access to the Gamestop or Wi-Fi Pikachu-colored Pichu distribution in order to gain access to the Spiky-eared Pichu.
its an event..
The Pikachu-colored Pichu can be traded into Pokémon HeartGold or SoulSilver. Then, you can take the Pichu into Ilex Forest to trigger the Gizamimi/Notch-eared Pichu event. The Gizamimi Pichu will automatically join your party, so make sure you only have 5 or less Pokémon in your party.
No, that is only avilable for Pokemon HeartGold and SoulSilver. But a Shiny Pichu can be obtained in any game with Pichu in it, but it's really hard to find.
Action replay or Nintendo events
Yes it can, but where is Shiny Pichu anyway?