Two-pack:
SLUGFEST & OVERKILL

Overkill
Allegiance: Decepticon
Funciton: Warrior
First Cartoon Appearance: 
Call of the Primitives
First Comics Appearance: none 
(correct me if I’m wrong!)

“Too much destruction is never enough!” 

Profile:  Whether he’s talking, terrifying or attacking, Overkill does everything to excess.  Other Transformers have been known to run out of fuel while listening to one of his interminable tirades.  So excessively does he rant and rave that potential victims often assume the role of an audience, laughing so much at his theatrics that they forget about the threat he represents.  On the battlefield, he’s usually so busy proving how tough he is by snapping cars between his powerful jaws or flattening small buildings with a swipe of his tail that he loses sight of what he’s there for.  This often leaves him wide open to Autobot counter-attacks.  Even when he’s actually engaged in combat he will sustain his attack long past the defeat of his opponent.  Overkill talks a better fight than he actually fights.

Abilities:  Overkill can record messages when he shrinks to cassette mode, but he primarily uses this mode as a devious way to strike at opponents.  Once he’s sneaked up on them he transforms to his full-size tyrannosaurus mode and launches surprise attacks.  In that form, he has tremendous strength.  He can rip open the hull of a battleship with a single swipe of his titanium steel claws.  He’s armed with two batteries of motion missiles, which zero in on their targets by responding to the targets’ movements.  The missiles are sensitive to the movement of any object larger than a baseball.  The best way to avoid getting hit by them is to stand absolutely still.

Weaknesses: A defect in Overkill’s transformation circuitry often results in him not being able to complete his transformations.  Specifically, he transforms from cassette to T-rex but he’s unable to grow to his full size.  He remains the size of the cassette.  When he’s stuck at this size he’s no more of a threat than a particularly vicious rat!

SLUGFEST
Allegiance: Deception
Sub-Group: none
Function: Messenger
“Expect betrayal and your friends won’t disappoint you.” 

Profile:  Slugfest is as lumbering and dim-witted as he looks.  The Decepticons can only count on him to do the simplest of tasks, which means he’s usually limited to carrying messages in his cassette mode.  This arrangement would be fine if Slugfest wasn’t so nosy.  Invariably, he plays back the messages for him before he delivers them, and then misinterprets them to be about himself.  This sends him into violent rages, since he hates when others talk behind his back.  At such times he attacks anyone and anything, friend of foe.  Only force or lack of fuel stops him.  Very often the end result of one of these trantrums is the inadvertent destruction of the message he carries, as well as any small towns that happen to get in the way. 

Abilities:  In cassette mode, Slugfest has a vast data storage capacity.  He can record and store up to 1.2 billion bits of date via visual, audio and electrical inputs.  In stegosaurus mode, he can use the armored plates on his back like the teeth of a chainsaw to cut through virtually any substance.  He carries two side-mounted solar powered vibro-cannons.  When fully charged (after at least an hour exposure to sunlight), the vibro-cannons can shoot beams of harmonic sonic energy that can shatter a bridge.

Weaknesses: In addition to being slow and stupid, Slugfest is prone to jamming when he’s playing back messages in cassette mode.  In Stegosaurus mode, his leg joints often lock into place hobbling or even immobilizing him.