This version of Robocco Wars, a Japanese-released NES game, appears to be a fan-made translation or modification known as a ROM hack. The "[En by Stardust Crusaders v1.0]" suffix signifies that a group or individual, potentially calling themselves 'Stardust Crusaders', has created an English translation patch for version 1.0 of the game. This showcases the lasting community involvement surrounding classic games.

Robocco Wars (Japan) [En by Stardust Crusaders v1.0]

Robo Warrior (Europe)