These inconsistencies were likely the result of developer Rare not being very familiar with the Double Dragon characters and story line. The Shadow Boss, who serves as the leader of the Black Warriors in this game, is an original character who closely resembles Burnov. In the crossover game Battletoads & Double Dragon: The Ultimate Team, an enemy character clearly intended to be Willy serves as the boss of Stage 3, although he is identified as Roper within the game.The manual for the Genesis version of Double Dragon published by Accolade misidentifies Willy as Jimmy Lee due to the writer mixing up the differing story lines of the NES and arcade versions.While the revenge plot was retained in this version, Marian's death occurs at the hands of a different character and the game's antagonist is a new final boss known only as the Mysterious Warrior. Willy was cut completely from the NES version of Double Dragon II: The Revenge.Despite this, the manual still describes him as the 'Big Boss' of the gang, which implies that he leads the group in some sort of figurehead capacity. While Willy still appears in this version, he's simply a sub-boss the player faces before the final showdown between the Lee brothers.

In the NES version of the original Double Dragon, Jimmy Lee serves as the leader of the Black Warriors.This nickname was used in the iOS/Android version of Double Dragon. He is nicknamed 'Machine Gun Willy' among fans, due to his weapon of choice, as well as to distinguish him from the similarly named Williams character that serves as the common enemy type for most of the series.

Double dragon 3 final boss