Successfully complete Blind mode under Vs. CPU mode to unlock a level 2 drop pattern for the character used. Note: Not all characters have a level 2 drop pattern.
Play as Brave
Successfully complete Ghost Puzzle mode under Vs. CPU mode to unlock Brave.
Play as Maggie
Successfully complete all 300 Classic mode levels in Single Player mode to unlock Maggie.
Unlock Character "Doggie"
Choose VS CPU mode. Then choose VS Classic puzzle mode. Beat the game on this mode to unlock the character.
Unlock character: Zaulen
Character Zaulen is unlocked by finishing all 300 levels in single player Ghost Mode.