Dear, Vector Prime.
Who are the two Shockwave generic next to the Onslaught-color Seeker (you said his name is "Overcast")?
Dear Generic Genuflector,
When Shockwave reestablished contact with Megatron in 1984, he became interested in his own set of Constructicons for use on Cybertron and created six of his own. The first two were experimental and he used his own body-type as a cloning template:
Roadslicer (road grader, left leg, clone)
Deadlifter (forklift, right leg, clone)
Benchpresser (straddle carrier, leader and torso)
Holepuncher (power shovel, left arm)
Distemper (pile driver, right arm)
Guzzler (energon harvester, scythe)
They combined into the mighty Obliterator and terrorized Cybertron in the 1990s. Two brave Autobots, Pyro and Clench mockingly called themselves "the Obliterator Obliterators" and managed to singlehandedly defeat the evil gestalt, slaying four of them. Shockwave, disappointed by his creations, put the remaining two clones—Roadslicer and Deadlifter—into stasis. Later, when Unicron attacked Cybertron, Shockwave reactivated them out of desperation to battle the Chaos-Bringer. They survived the calamitous battle, but possessed a low self-esteem due to Shockwave's callous dismissal of them. Thus, they were eager to find validation wherever they could and very quickly fell under Galvatron's command alongside Overcast and the rest as soon as the opportunity presented itself.
Though they kept their creator's appearance, they changed their names to highlight their outlier abilities. Roadslicer became Soliton (bot on the left), due to his ability to create tremors and waves in the ground; Deadlifter became Thunderclap (bot on the right) due to her ability to create devastating sonic waves with thunderous applause.
