Nemesis Breaker
- Nemesis Breaker is a Decepticon in the Cybertron portion of the Unicron Trilogy continuity family.

Nemesis Breaker says, "Rarrr!" That's because he's a soulless, sparkless creature of rage, seemingly nothing more than a physical manifestation of Megatron's power and hatred, as well as Leobreaker's jealousy over Optimus Prime's usage of Wing Saber as his new magic mushroom.
Japanese name: Dark Ligerjack
Fiction
Animated continuity
Cybertron
When Megatron returns as a ghost after his defeat in the fire dimension, the magical black foggy stuff energies that surround him ensnares Leobreaker, creating Nemesis Breaker, a sparkless clone of base animal instincts. Megatron claims that the beast was created out of Leobreaker's anger and jealousy over Optimus Prime's preference of selling the latest toy that combines with him, I mean the latest team member that gives him a new powered-up mode.
When Megatron gets his ass beat down bad by Metroplex, Nemesis Breaker disappears, presumably into a plot hole.
Later, when Megatron tapped into the Gigantion Cyber Planet Key and upgraded into the uber-powerful Galvatron shortly afterwards, it seems he didn't care enough to recreate Nemesis Breaker.
Toys
Cybertron
- Nemesis Breaker (Voyager-class, 2005/2006)
- Japanese ID number: EX-01
- A redeco of Leobreaker in the typical-to-evil-clones scheme of black and dark gray with turquoise trim, Nemesis Breaker transforms into a robotic lion with electronic sounds. Plugging a Cyber Planet Key into each of his forelegs/forearms flips down a pair of claws. He can also form something resembling a clawed arm that can be attached to the Cybertron Leader-Class Optimus Prime and Megatron molds. He comes with a silver-bordered Jungle Planet style Cyber Key; the Hasbro version has the Key code "v6f5".
- The Takara version of the toy was released first, as a Toys 'R' Us exclusive. (It was originally solicited as a normal retail release with the ID number "GD-14", but supposedly, low sales of Galaxy Force forced several larger show-toys into being exclusives.) The Hasbro version was released at normal retail, and had numerous small paint application changes, most notably the Decepticon-sigil "tattoo" being on his right shoulder, rather than left.
- This mold was used as the model for the non-toy body for the Generation 1 Predacon Razorclaw in the "Dawn of Future's Past" comic book.
Trivia
- The television CGI model of Nemesis Breaker used during the combiner sequence animation, as well as the representation of the combined arm mode is based upon a modified version of one of the original prototypes of Leobreaker, who had a much more complex and believable 'arm-mode'.

