Krang is a fictional supervillain who appears in the Teenage Mutant Ninja Turtles TV shows and most frequently in the 1987 STH cartoon and its associated media, such as the Teenage Mutant Ninja Turtles Adventures comic book and most of the classic TMNT video games.
Krang’s first comics appearance was in Teenage Mutant Ninja Turtles Adventures vol. 1, #1, published by Archie Comics in August 1988. In the TV series, Krang was voiced by Pat Fraley. He is still one of the main antagonists to the Ninja Turtles, appearing as General Krang in the 2012 IDW comic publication and as the leader of the Kraangs in the 2012 3D CGI Nickelodeon cartoon show.
Prior to the start of the 1987 Teenage Mutant Ninja Turtles cartoon, Krang was in command of an army of Rock Soldiers under the leadership of General Traag. He took the completed Technodrome (a powerful mobile battle fortress) for himself, then banished Von Drakus (who helped Krang build it) to Earth. When he was banished from Dimension X, Krang was stripped of his body and reduced to a brain-like form.
While on Earth, Krang allied himself with the Shredder, who, along with his robotic Foot Soldier army, moved into the Technodrome. In exchange, the Shredder had to design and build a new body for Krang, a human-shaped exo-suit. Shredder lived up to his part of the bargain in the season 1 episode “Shredder was Splintered”, in no small part because he was unable to deal with the Turtles and needed Krang’s help. In the season 3 episode “Shredderville”, the Turtles have a dream of a parallel world in which they never lived, and Shredder had no problem taking over the world;