Suggested by Sonic Sentry is an extremely powerful fighter and his speed is quite incredible. Unicron will have a lot to deal with in trying to keep this guy down. Unicron has the durability to tank some of the hits but ultimately he runs into the common issue of not having the speed to evade Sentry’s hits for long. As a result he will just be shattered into a million pieces with no way to really land any counter strikes on the Sentry. It’s a lost cause for him. Sentry wins.