Sketch Bug
From Final Fantasy Wiki
The Sketch Bug is a bug from the game Final Fantasy VI. It is one of the most infamous bugs in the entire series. It occurs whenever Relm misses the target she is supposed to Sketch, or when she sketches a difficult to sketch target. The bug can have various effects, such as filling the player's inventory to the brim with items such as Dirks and Gem Boxes, causing the game to freeze, or erasing all data. The bug is best seen when trying to sketch enemies with the Clear status, such as the Intangir or Gabbldegak after it casts Vanish on itself (usually Sketching a Gabbldegak leads to the best results). Another variation includes sketching Gau when he reappears in the Veldt. This bug only occurs on ROMs and in the Super Nintendo Entertainment System version 1.0 of the game (a later version, 1.1, was released without the bug). It does not appear at all in the Anthology re-release or the Advance port.
