Pikachu-Colored Pichu is an Event Pokémon
given out at GameStop
It has the same features as a regular Pichu except for one thing. The skin color of it is the skin color of a Pikachu. It is a Shiny Pokemon, but it can only be obtained by an event.
How it is used
When Pikachu-Colored Pichu is brought to the Ilex Forest in Pokémon Gold and Silver, Pokemon Crystal, and Pokémon HeartGold and SoulSilver the event will begin.