April 1 2005 was an April Fool's Day that fell on a Friday.

Hoaxes

A magazine page scan depicting Korechū

Pokémon-related hoaxes this year included:

• A new Pokémon, Korechū (Japanese: これュウ and これちゆぅ, sic) was revealed in a magazine page scan. [1] [2] [3] [4]

Aesthetic changes

Bulbagarden forums

Bulbapedia

Serebii.net

A fairly predictable joke that recurs each April Fool's Day is an aesthetic change:

• Bulbagarden forums forced all users to adopt a skin for a day, parodying the scheme of Serebii.net forums.
• Bulbapedia was taken over by a cabal, and various texts were changed to reflect this.
• Serebii.net used the classic Digimon-for-Pokémon substitution.
• Pokedex.jp also changed its appearance to focus on Digimon.

Content changes

Haruka Fanclub

Dogasu's Backpack

A variation on the previous theme, some sites change their focus:

• Haruka Fanclub turned into an crudely done Misty fan site for the day.
• Dogasu's Backpack changed into "Mod Soul" Kon's Backpack, a Bleach site.

Non-hoaxes

Real announcements misinterpreted as hoaxes included:

• None reported so far