Megatronus is a pretty impressive Transformer. He does live up to the rep of being one of the strongest to exist. That being said, he is sorely outmatched against an opponent as deadly and invincible as Bass. Bass is simply too formidable and he has too many combat options. What do you do against an opponent who can absorb all projectiles and who also has limitless speed? The match effectively feels over at that point. Bass wins.