Choose which side you will fight for when you wear officially licensed Transformers costumes from spirithalloween.com! Lead the Autobots into battle when you transform yourself with an Optimus Prime costume. Maybe you're more of the strong and silent type, which makes you a perfect candidate to become Bumblebee and show up just in time to save the day. Use your brute strength to help the Autobots defeat the Decepticons when you wear the Grimlock costume. Looking to walk on the evil side this Halloween? You'd be well-suited to turn into Megatron and use your power to destroy the human race and conquer the Autobots!