Profile, Abilities and Weaknesses description is from The Transformers: More Than Meets The Eye, comic series published by Dreamwave Comics in 2003.

BIO 
Slog is the most tasteful and refined of his comrades. When he originally joined the Decepticons, they used his exceptional talent as an artist to produce sculptures and art pieces depicting the glory of the Decepticon empire and its leaders, and record their rise for posterity. Eventually, they realized Slog was a capable warrior as well as artist, although his battlefield work is definitely of the more "abstract" variety. He carves up his foes on the battlefield more out of a desire to survive than actual spite, and he always attempts to make each of his victims a work of art to honor their memory. This aspect of war, and the fact that the Decepticons have no interest in supporting free expression and art, troubles Slog. Although he finds destruction to be the best way to create pure, chaotic art in an inanimate subject, he wonders about the lives lost in the AutobotlDecepticon conflict.  Slog once organized an underground art show of his work, reflecting the horrors of war in the twisted, rusting ruins of his foes.  This led to the coining of a new art form-"slogism"-and the use of the exhibit's pictures in the Autobots' anti-Decepticon broadcasts. This and his occasional doubts about his cause have not pleased his Decepticon superiors. 

WEAPONS/ABILITIES
Subject possesses great intelligence and exceptional talent and skill as an artist. He is a surprisingly effective warrior. Subject's outer shell has harder-than-diamond talons capable of cutting through almost any substance. Inner robot is armed with a magnetic rifle that can be set to fire waves that repel or attract; it can even make its targets' bodies repel themselves, tearing apart metallic opponents.
Combines with fellow Pretender Monsters to form Monstructor.

WEAKNESSES
Subject has bouts of depression that can make him useless in combat. 

Bibliography of significant appearances:
The Pretender Monsters made only one appearance in the G1 continuity:
* Transformers (Marvel) #67 - In this 'alternate reality' story, Galvatron reigns supreme and has left New York City in Ruins.  Interestingly, the story is set in 2009 and depicts a deactivated Rodimus Prime hung between the Twin Towers of the World Trade Center.  

* In later years the team was featured in GIJoe / Transformers Crossover series published by Devils' Due comics.

* The team was also featured in the IDW-verse as the lone combiner.  Apparently, in their view, combiners are an unheard of concept until Monstructor is developed by Jhiaxus...

Other Appearances: