Yu-Gi-Oh! Nightmare Troubadour is one of the many video games developed and published by Japanese company Konami back in 2005, only for the Nintendo DS portable console, based on its hugely successful Yu-Gi-Oh! anime franchise, with its story focusing on the Virtual World arc from the TV series.
Yu-Gi-Oh! Nightmare Troubadour, while introducing new control schemes that use the Nintendo DS' unique features like its touchscreen, still uses the same mechanics employed by the games up until then, forcing players to collect trading cards with monsters on them, which are then used in battles against other opponents, called duels.
CHEATS
Password Machine
Win the Expert Cup. The Password Machine can now be accessed in the Duel Shop by tapping the slot machine on the left. The Password Machine allows you to type in the ID number of a card you have and insert it into the game (for 1000 KC). Passwords will only work if you have obtained at least 80% of the pack it comes in (you have the card list) or the card is on your card list (total). You can only get one copy of a card, and no God cards.