Seto Kaiba and Virtual Dark Yugi's Duel

Seto Kaiba faced a virtual simulation of Dark Yugi, based on Kaiba's memories, in a game of Duel Monsters, in Yu-Gi-Oh! The Dark Side of Dimensions.

Duel
Kaiba almost immediately Summons "Neo Blue-Eyes Ultimate Dragon".

Dark Yugi Summons "Dark Magician" and activates "Thousand Knives"

Kaiba activated a Trap Card and attacks "Dark Magician".

Dark Yugi Summoned "Celtic Guard of Noble Arms" and "Celtic Guardian"

Kaiba Summoned "Kaiser Vorse Raider".

Dark Yugi Summoned "Dark Magician Girl"

Kaiba attacked with "Neo Blue-Eyes Ultimate Dragon". Dark Yugi activated "Dimension Reflector", Summoning a Trap Monster with ATK and DEF equal to that of "Neo Blue-Eyes Ultimate" and would inflict damage to Kaiba equal to its ATK. However Kaiba activated a Trap Card, raising the ATK of "Neo Blue-Eyes Ultimate" to 9000. Kaiba attacked with "Neo Blue-Eyes Ultimate", defeating Dark Yugi.

Aftermath
The simulation ended and one of KaibaCorp's scientist informed Kaiba that the system was working well. However Kaiba was annoyed and thought it had been pointless, as he had not perfectly recreated Dark Yugi.