Every Yu-Gi-Oh video game featured a deck editor. This is so you can create your own decks to your own preference and style. However, on the recently released Yu-Gi-Oh Rush Duel: Dawn of the Battle Royale, this option is not available at the start.
This is because on the Japanese release of the game a few months prior, you would have to finish the main story in order to unlock the deck edit option. This could take hours of grinding and months to do if you do not have time. Luckily on the latest patch, a solution was revealed.
In order to unlock the deck editor option, first you will have to defeat Number Six on the main story mode. Then you will have to go to the Student Council Room. On the left side of the map, there is a door. Have your character stand in front of the door. Once your UI disappears, enter the Konami Code. And there! it is unlocked.
Now with this unlocked, you can build as much decks as you want at least one hour into the game.
Be sure to check out my review of Yu-Gi-Oh Rush Duel: Dawn of the Battle Royale next week.