????? party overloading is a glitch in Pokémon Gold, Silver and Crystal.
After the player obtains a ????? (00) or (FF) from the bad clone glitch or Coin Case arbitrary code execution, they may use "move PkMn w/o mail" in the PC to withdraw a seventh Pokémon into the party, after which more can be added to the party using the normal withdraw Pokémon option.
The glitch allows the player to perform multiple glitches, including: