Toonami debuted on March 17, 1997 to the United States Cartoon Network originally it aired weekdays from 4-6pm than in summer 1999 when the TOM era began it extended to 4-7 than in summer 2001 it was shortened to 5-7pm than in summer 2002 went back to it's old 4-7pm format and from there it's had here and there points when it was 4-7 and 5-7 than on April 17, 2004 it moved to Saturday nights from 7-11pm which it still remains that way as of present day. Toonami is a block that airs japanese anime as well as american cartoons with a lot of fighting.

    Shows that aired on toonami

    Batman, The Animated Series
    Batman Beyond
    The Batman
    Justice League
    Justice League Unlimited
    Sailor Moon
    Voltron - Defender of the Universe
    He-Man and the Masters of the Universe
    G.I. Joe
    Transformers Armada
    Transformers Energon
    Transformers Cybertron
    Pokemon Chronicles
    Pokemon Battle Frontier
    Wulin Warriors
    Big O
    The Real Adventures of Jonny Quest
    Beast Wars
    Zatch Bell
    Tenchi Muyo!
    Tenchi Universe
    Tenchi in Tokyo
    Card Captors
    One Piece
    Ronin Warriors
    Cartoon Roulette
    Outlaw Star
    Fantastic Four - World's Greatest Heroes
    Dragonball Z
    Dragonball GT
    Megas XLR
    Teen Titans
    Rurouni Keinshin
    Powerpuff Girls
    Zoids fusors
    Cyborg 009
    Astro Boy
    Duel Masters
    G-Force: Guardians of Space
    Gundam: 08th MS Team
    Gundam 0080
    Gundam Wing
    G Gundam
    SD Gundam
    Gundam SEED
    Jackie Chan Adventures
    Rave Master
    Yuyu Hakusho
    Zatch Bell
    Star Wars: Clone Wars
    Hot Wheels: World Race


    Bionicle: Legends of Metru Nui
    Bionicle: Mask of Light
    The Iron Giant
    Castle in the Sky
    Batman (1989)
    Batman: Mask of the Phantasm
    Batman & Mr. Freeze: Sub-Zero
    Batman: Mystery of the Batwoman
    Batman/Superman Movie - World's Finest
    The Batman vs Dracula
    Batman Beyond: Return of the Joker
    Superman: Braniac attacks
    Justice League secret origions
    Justice League: The Savage Time
    Justice League: Starcrossed
    Naruto recap special
    sailor moon movies
    Spirited Away
    Hellboy: Sword of Storms
    DBZ movies
    Jonny Quest vs. The Cyber Insects
    Blue Submarine No. 6

    tons more!