Unlock the following duelist partners by performing the corresponding tasks. After unlocking the ones that have an alternative story (for example, Carly and Yusei), take them to Lenny by the shoreline, and choose "I want to see my partner in a new light".
PARTNER - HOW TO UNLOCK Akiza - Use the "UMD Recognition" option. Dark Singer Carly - Beat Jack's storyline. Dark Signer Kalin - Beat Yusei's storyline. Dark Singer Misty - Beat Akiza's storyline. Devack - Beat Luna's storyline. Enforcer Kalin - Use the "UMD Recognition" option. Mimicry - Beat all page one storylines (Akiza, Jack, Yusei, etc.). Mina - Use the "UMD Recognition" option. Rex Goodwin - Beat Singer's storyline. Testu Trudge - Beat Trudge's storyline. Yusei - Beat Rally's storyline.