Rack'n'Ruin

† Before the events, the Rek-i-Ruin were part of the Ark's crew and were placed into stasis.
† Appearance. First appeared in Bumblebee's false memory created by Shockwave. Later, they were awakened along with the rest of the crew after Teletraan-X uploaded himself into the Ark's onboard computer.
† Some episodes. Participated in the battle on the Moon, confronted the Seekers, and fought Clobber on Cybertron.
† Jokes. There's a recurring joke about the Wreck-i-Ruin: they constantly try to arrange a large pile of crates into a neat stack, but for one reason or another, the crates always end up scattered.

† Physical abilities. Wreck-i-Ruin are strong and resilient Autobots. They don't need weapons—they can fight barehanded.
† Transformation. Can transform into a tank.
† Personality. Loud, enthusiastic, self-praising, and a bit dim-witted. Nearly identical in personality and temperament. Together, they are ready to complete any task Optimus Prime assigns.
† Traits: Unlike previous incarnations, where Wreck and Ruin were two separate Autobots fused together, this version of the character was born as conjoined twins.

Rack'n'Ruin are Autobots from the animated series Transformers: Cyberverse. They are two Transformers fused into one body, resembling Siamese twins.