Extinction

''"Surprise, Megatron! Meet Extinction!" ''—Optimus Prime introduces Extinction.

Extinction is the combined form of all the Dinobots. Originally, the Dinobots were not supposed to combine, but Optimus Prime granted them the ability shortly after Megatron created the Destructicons, as he assumed the new Decepticon team had a combined form. Extinction is not the smartest known Combiner, but he is one of the most powerful Transformers around. Some could say that he is the complete opposite of the Destructicons' combiner form, Destructor.

Extinction is the combination of: Extinction's compassion is fueled by Grimlock's determination to be a prime example for the Autobots as well as his determination to do what's right. It is a mistake to believe Extinction is merely a weapon to be used against the Decepticons, for he is actually very compassionate about all life.
 * Grimlock
 * Swoop
 * Slag
 * Snarl
 * Sludge