Transformers - Season 2

Megatron plans to drill his way to Earth's core in hopes of getting large amounts of energy. The Autobots try to stop him and initiate their new plan to take control over Devastator. When both sides battle for controlling Devastator, though, it causes disaster.
 

After someone steals him, Tracks is briefly unable to transform or talk. This isn't so bad, however, as it leads to the discovery that Decepticons are planning to turn stolen cars into weapons.

Most of the Autobots lose their ability transform to robot mode after the Decepticons use a device on them. A handful of Autobots still capable of transforming are their only hope.

A lagoon within a forest is discovered and found to contain a substance called electrum, which can make anyone invincible. The bad news is that the Decepticons manage to use it on themselves first.

On the way to Earth with a type of insecticide to use against the Insecticons, Spike, Bumblebee and Cosmos encounter Morphobots. They get away just fine, but they inadvertently take Morphobots along for the ride.

Omega Supreme reveals his past to Optimus Prime, which involves a city's destruction, Megatron and the Constructicons.

The space bridge accidentally sends several Autobots and Decepticons to a strange world in which they are no bigger than toys.

With the others rendered powerless, Smokescreen has to enter the gambling world to get the Energon needed to revive them.

Elita-1, leader of a group of female Autobots causing trouble for the Decepticons, is captured and used as bait to lure Optimus Prime into a deadly trap. However, Elita-1's strange time manipulation technique saves him, but leaves her close to death. Her only chance for survival lies in Alpha Trion.