You and your decepticons and autobots were trick or treating because it's already Halloween

Optimus prime: Wears a Cookie monster costume

Megatron: Wears a Bowser costume from super Mario bros

Bumblebee: Wears his tanjiro costume from Demon slayers

Arcee: Wears a little mermaid costume

Starscream: Wears a star wars costume

Ratchet: Wears the scream costume

Knockout: Wears a vampire costume

Cliffjumper: Wears Mario

Wheeljack: wears Luigi costume