First off I want to say I love this game and love to play. This game features extremely well put together graphics and gameplay, however I absolutely hate adding new robots to this game. some of these new robots are ok but most of them are awful.
-Cardinal Chaos is a stronger version of noisy boy
-nitro, trigore, and scorpion are a little over exaggerated etc.
Take the robots you havent used in Your other real steel game such as Cosmo and excavator, and possibly take robots from the Xbox game. Once you run out of robots then move onto new ideas.
D-Man867 about Real Steel