Shadow Marine is an enemy from Battletoads & Double Dragon: The Ultimate Team.
Shadow Marines are thugs clad in space suits who serve the Shadow Boss. While they're not particularly difficult to defeat, their punches and "human drill" attacks can take a chunk of the player's health. They can also knock the player off the Colossus when hanging from the edge of the tail if they're not careful.
They reappear in the final stage, just before the battle against the Dark Queen.
- In the NES and Game Boy versions of the game, some of the Shadow Marines from the later portions of Level 1 are drawn differently from the initial type, as they wear astronaut-like helmets in lieu of their usual hoods. These alternate types are absent in the Super NES and Sega Genesis versions.
- Even though they wear futuristic space suits and despite reappearing at the end of the game, guarding the Dark Queen's lair, the manual's description states that Shadow Marines belong to the Shadow Boss's personal army, thus making them belong to the Double Dragon franchise rather than Battletoads, as they may give the impression at first glance.