A series written by theonelittleguy on fanfiction.net - a crossover between The Legend of Zelda and the Pokemon universe.
The main character is an incredibly stupid, naive and "accident-prone" Pichu/Pikachu. He spends most of his time screwing stuff up and hiding behind plot protection.
There are currently two installments in the series - The Pokeflute of Time (OoT) and Majerkass's Mask (MM). It is unknown if there will ever be a third installment.
The crossover you've been dreading: It's Ocarina of Time, but everybody's a Pokémon! Enjoy this less than accurate retelling of the classic game where the Hero of Time is an idiotic Pichu and his partner is the bitchiest Happiness Pokémon you've ever met! (The Legend of Eevee: Pokeflute of Time, summary)