To actually answer the topic's question, this unlockable character roster posted on 2chan actually being real...
- Luigi
- Bowser Jr./Shadow Mario (Changes like Zelda in SSBM)
- Baby Mario & Luigi
- Geno
- Young Link (Wind Waker and Phantom Hourglass version, is not a clone of default Link)
- Wolf Link & Midna
- Ganondorf (Has own moveset, is not a clone)
- Shiek (Seperate character from Zelda)
- Vaati
- Mewtwo
- Pokemon Rival (Turtwig, Croconaw and Blaziken)
- Lucario
- Jigglypuff
- Zero Suit Samus (Unlocked to be selected apart from Samus)
- Ridley
- Falco (Has own moveset, is not a clone)
- Krystal
- Ness (Has own moveset, is not a clone)
- Animal Crosser
- Marth
- Roy
- K.Rool
- Black Shadow
- Sukapon
- Mr. Game & Watch
- Takamaru
- Ray 01
- Andy
- Mii (Looks like your Mii! Weight and size differ, but attacks are always same)
How dare you throw Vaati in the list, rumour jerk!? My favorite Zelda villain ever doesn't have a lick of a chance at being in!