Secret of Mana

[Barack Obama]

Finally, the information I needed:

Dropped chests contain the following traps depending on the enemy's level.
Level 1-10: Punch glove, Poison needle or Bomb
Level 11-15: Bomb
Level 16-25: Riot gas
Level 26-30: Stone trap
Level 31-36: Mimic box
Level 36-99: Doom Trap or Shadow Zero (1/8 of the time)

Riot gas causes mini, moogle or sleep at random.
Punch glove and Bomb cause damage equal to your level + Random*8.
Doom trap sets your HP to 1 or kills you (1/8 of the time).

Shadow zero will, 1/8 of the time do a funny animation where he trips over and gets stuck in the lid.

Traps are escaped if your agility is high enough. Otherwise, the trap is triggered half of the time. The Analyze spell will disarm a trap if the spell's level is high enough. If a chest contains an energy orb that you can't have, you'll only get a candy.

Source: http://tasvideos.org/forum/viewtopic.php...945#160945

This would also explain the Mimic Box which I've encountered previously, since I was playing around with level codes and got it with a glitchy lv. 15 which was probably a 35. The following Doom Trap at lv. 16 (which was a 36) also fits his description.