The Forcefield Generatorprotects against Null Matter.
The Forcefield Generator was created by Tekla to act as a personal forcefield against Null Matter, allowing members of the Alliance to engage in physical combat with members of the Beast Planet without injury.
Princess Tekla's forcefield generator is first seen in Episode 2.6 "Girls Night Out" when Graveheart visits her in a laboratory on planet Ice after hearing an explosion. She explains that she is adapting what Telepod technology to develop a forcefield generator, useful for protecting against contact with Null Matter. The forcefield is later successfully used when Jade, along with Zuma, Zera and Pelvus on their night out, are confronted by Lamprey during a bar room brawl inside Moon Over Mayhem.
More, production forcefield generators are seen in Episode 2.11 "Death of a King" when Tekla, Pyrus and Lady Zera are within Lord Mantel's throne room, trying to convince him of the folly in attempting to launch another attack against the Beast Planet. When Blokk arrives with his Beast Drones, Tekla provided Mantel with a forcefield generator within which to fight the Beast Commander. During the fight, Blokk is able to kick the forcefield generator itself, revealing it as the weak point in the protection that it offers, allowing him to kill Lord Mantel.
Graveheart uses a forcefield generator in Episode 2.13 "Ascension" in order to fight Blokk inside planet Rock's World Engine core. Graveheart is able to kill Blokk (who lacks the containment unit of standard drones) when he pushes the forcefield generator into Blokk's body, weakening him and causing him to fall from the dangerously suspended core, disintegrating as he falls.