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

Hoaxes

A magazine page scan depicting Korechū Pokemopolis

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 also depicting a DS port of Hey You Pikachu. PokéLord later admitted it had composed it as a joke.[1] Chance (Japanese: チャーンス Chānsu), believed to be a pre-evolutionary form of Chansey, is revealed as a new TCG card.[2][3] Its attack is "April Fool". Pokemopolis posted a cease and desist letter from a law firm representing Nintendo that claimed the site had tarnished Nintendo's image. PokéMasters forums faked a database error. Serebii.net forums had an elaborate custom avatar prank which angered many. Legendary Pokémon showed a fake magazine page scan, revealing the shadow of a Pokémon named エイプリルフール — a katakana rendition of April Fool.

A Chance TCG card PokéMasters forums File:Legendary Pokemon April Fools.gif A scan showing April Fool

Aesthetic changes

Bulbagarden forums Bulbapedia

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.

Serebii.net

Content changes

Haruka Fanclub

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.

Dogasu's Backpack

Non-hoaxes

Real announcements misinterpreted as hoaxes included:

• Pokémon Casewraps^[4] - a customise your consoles with Pokémon images, but as the information was released on April 1, there was confusion as to whether it was real.