Cast known so far:
Alice - May (Pokemon)

Alice's Sister -
Dinah - Sparky (Frankenweenie)
White Rabbit - Sonic (Sonic X)

Doorknob - Brain (Brain And Scamper Show/Igor)

Dodo - Buzz Lightyear (Toy Story)
Tweedledee and Tweedledum - Al & Bill (Anthony Anime)

Walrus - Jack Skellington (The Nightmare Before Christmas)

Carpenter - Bonejangles (Corpse Bride)

Bill the Lizard - Master Shake (ATHF)

Flowers - Various People

Caterpillar - 1 (9)

Caterpiller (Butterfly) -

Bird in Tree - 

Cheshire Cat - Anthony (Anthony Anime)

Mad Hatter - Stimpy (Ren and Stimpy)

March Hare - Ren (Ren and Stimpy)

Dormouse as Himself

Queen of Hearts - Mom (Futurama)

King of Hearts - Meowth (Pokemon)

Cards Painters -

Marching Cards -Various People