Mars is Omega Robotallion's Mechtogan. Kodo's other Bakugan are also able to summon him but it takes up more energy.
Mars has large, razor sharp arms that are covered in a special poison. When it enters the opponents blood stream, their blood will begin to boil, before turning into burning, hot lava, incinerating them in minutes. He is covered in Cannons and lasers, ready to obliterate his enemies on a moments notice. He is know to be able to contol molten lava, using it to burn his opponent or even as a shield for his body.
Despite being named after the God of War, Mars is actually quite passive, He will gladly fight anyone who opposes his Master, but generally doesn't like to fight, similar to Robotallion. He is brave and heroic but also has a mean streak. He enjoys to watch bad Bakugan suffer from the effects of his poison and doesn't show any regret.
Omega Robotallion spawned him in an intense training session against Cyborg Avior. Robotallion was able to control him instanly and the two worked well together, quickly taking down Avior. It was later discovered that Kodo's other Bakugan where able to spawn Mars but it took up more of there energy and they couldn't sustain him for long.