Battletoads & Double Dragon - The Ultimate Team is the fourth game in the Battletoads series. It is a crossover with the Double Dragon series of beat 'em up games developed by Technos Japan. It was released for the NES, with ports for the Super NES, Sega Mega Drive/Genesis, and Nintendo Game Boy. Despite the presence of the Double Dragon characters, Technos Japan had no actual role in the game's development.