Created By: onyhow on June 18, 2010 Last Edited By: onyhow on June 20, 2010

Only One Me Allowed Right Now

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In most time travel stories or cloning ones, one character can have multiple copies of themselves running around in a same period, some might have problem if those copies meet each other, then there is this case...

Only One Me Allowed Right Now is a case where the universe either flat out denies multiple copies of a character to exist in a same time period, or that either the character and the copies go crazy or the universe starts to break down. This either involves Cloning, Time Travel, or Alternate Universe.

Note that this is NOT Never the Selves Shall Meet. In that one, you can have millions of copies of a same character running around in the same universe without that much trouble, only they must not meet each other. In this case, even there are only 2 copies and they are at the opposite side of the universe, the problem still happens


  • In Star Wars Expanded Universe, this is believed to be the case with clone madness when the clone is created if the process is accelerated, like using Spaarti cloning cylinder.
  • In Justice League, Vandal Savage's time machine cannot send a person back to when that person existed.
  • In Infinite Space, a rogue Zenito general repeatedly used mind transfer to escape death when you killed him. Franny stopped this by altering the transfer to copy the mind to all the clones, causing him to go crazy and die, because there can't be more than 1 copy of a person at a time.
Community Feedback Replies: 7
  • June 19, 2010
    The first Futurama movie had this in effect. When ever a duplicate was created through time travel the universe would kill them off to prevent further confusion.
  • June 19, 2010
    Tabletop RPG
    • Dungeons And Dragons 1st and 2nd edition. When a clone was created with the Clone spell, both the original and the clone knew of the other's existence and each would try to kill the other. If they couldn't, within a week either one would go insane and kill itself (90% likely to be the clone) or, 2% of the time, both would kill themselves.
  • June 19, 2010
    I think we have this... one of the "what measure is..." tropes
  • June 19, 2010
    In Seven Days when Parker goes back in time, the Parker from the time he goes back to disappears from existence.
  • June 19, 2010
    @Mozgwsloiku: Which one again? I don't see any...
  • June 19, 2010
    This is in effect in Diane Wynne Jones' Chrestomanci universe, which is why Gwendolyn's other lives all switch universes whenever she does.
  • June 20, 2010
    In one episode of Sgt Frog, Keroro accidentally clones himself a thousandfold. After various hijinks, the clones start to fade. Kululu gives a Technobabble explanation, but when told by Natsumi to "use words real people understand," he gets down to the point: if they don't destroy all the clones, then all the Keroros, including the original, will disappear.