A psychological warfare enhanced battle suit is an advanced weaponry full-body armored suit designed in TCRI's experimental research laboratory. The psychological warfare component comes from the fact that the suit is designed to make the wearer look like a very large rat.
History[]
After being sprayed by a strange blue gas, the Rat King loses his ability to control rats but gains the ability to control reptiles, which brings the Turtles under his power. Hoping to find a way to regain his dominion over rats, he sends Donatello back to his lab at the Turtle Lair to study the canister which held the blue gas. Rat King then tells the other Turtles that they will help him acquire weapons. To this end, they break into the TCRI building. In the psychological warfare lab, the Turtles acquire three psychological warfare enhanced battle suits, making the trio look like giant rats. The Turtle King, Part One
With the newly armored Turtles, Rat King sets out to take over the city. He first stop is Maison de Fromage, a cheese shop. A fiery blast from the weapon in Leonardo's suit breaks out the front window so that Michelangelo and Raphael can throw cheese out to the waiting rats. The next stop for the Rat King and his new minions is an unfinished subway tunnel, where he has them use the weapons in their suits to blast through the wall in order to flood the tunnel and the city. The plot is stopped by Splinter and Donatello. The Turtle King, Part Two
The Turtles go back to the TCRI building in order to return the battle suits to Professor McGuffin along with their apologies for taking them. Voyage to... Turtlantis