Gromaides is a minor antagonist in Abobo's Big Adventure.
Gromaides is a gigantic alien boss seen in the first Contra game as the boss of the Waterfall level.
In The Game
The boss is encountered near the end of Contrabobo, as the Alien is prepared to fight Abobo, however, before Abobo can do anything to attack the giant alien, a gigantic Kirby then inhales the alien, making Kirby replacing the boss fight by obviously eating him. This marks the first time a boss in the game that can be encountered but can't be fought in anyway.