Grants total invincibility during duels. Note that you can still take hits or lose during bonus rounds.
Here’s a short story based on the idea of Gunblood cheat codes.
If you want to practice against specific late-game opponents without playing through the entire campaign, use these level-skipping codes. Cheat Codes - Gunblood Guide - IGN
On the character selection screen, look for the text box labeled at the bottom.
The to jump straight to the final boss. Tips on how to beat the bonus rounds (bottles and birds).