Transformers feats/discussion

[Thirteen prime]

The Fallen, using a fraction of his remaining power, was able to heal all of Megatron's damage.

He was able to change Megatron's body, strengthening it, which is apparently why he acquired most of his abilities (increasing his mass threefold, an interdimensional bridge with which he can move between stars, and a cell for dividing dark matter) this can probably be attributed to transmutation, strengthening statistics and granting powers.
Can harm Megatron while in another dimension.

It is directly stated that he was weakened very much, so this explains his loss.

As shown, copies of the Allspark destroyed another solar system.

Considering this, he was able to take the Star Harvester explosion and the Fake Matrix explosion in his face, the former can absorb all the energy of a star, which would essentially destroy that star system, and the latter is almost equal to the Allspark, so he took two star and solar system level explosions.

 

[Thirteen prime]

Optimus beat Shockwave so badly that he had to change his body to a new one in Dark of the moon.

We know that Shockwave can easily withstand falls that would cause a Tunguska event, its power varies from 10 to 40 megatons.
Ravage, although destroyed, remains in decent condition during the explosion of the plant.

Arcee, Chromia and Elita One can easily dodge lasers which in Bayverse at least in the novel are described as flying at the speed of light at least in the scene with the Star Harvester beam.

Demolisher destroyed many large buildings with his movement.