Romulus Slag

Captain Romulus Slag is the leader of a band the space Robot Pirates and wants the Lombax Secret for himself. His first mate, Rusty Pete, is usually seen alongside him singing pirate melodies while drinking grog. His hands can transform into hooks, hammers, and a grog mug that makes him breathe fire like a dragon. Percival Tachyon created him and his crew, but the two are on different sides since they want the secret for themselves.

Tools of Destruction
Slag first appears with Rusty Pete in Tools of Destruction searching for the Lombax secret. He attacks Ratchet and Clank three times in space while they are flying through space in Aphelion. They manage to shoot down Slag's ships and escape each time. They also infiltrate Slag's hideouts at Ardolis and Kreeli Comet. Eventually Slag and Pete follow Ratchet to Jasindu and take the secret, the Dimensionator.

Ratchet then goes to Slag's fleet in Ublik Passage and fights through his forces until he finds Slag and Pete on Slag's flagship. Ratchet fights and defeats Slag, causing his body to explode, leaving only his head, which Rusty Pete catches in his arms. Slag tells Pete of "wenches as far as the eye can see, each holding a glass of grog and a smile for old Slag" before passing. Pete briefly mourns his captain, but then drops the head and makes Ratchet his new captain as per the pirate code.

Quest for Booty
In the sequel after Tools of Destruction, Slag is seen when Ratchet allows Rusty Pete to help them find the Fulcrum Star. Rusty Pete carries his head on a stick and calls it "Slag on a stick" by "rerouting his databank to his vocal processor". Unknown to Ratchet, however, Rusty Pete wants to revive Slag using Angstrom Darkwater's body.

Though Slag can't talk by himself, he is able to help Ratchet within Morrow Caverns with several puzzles, which Rust Pete did not know since he was asleep at the time. He even goes as far as singing the "Song of the Dead" and helping with the passwords. Along the way he mocks the "dead crew" for not joining the mueteny and even going as far as challaging a giant bat if only he had his legs.

Once Ratchet has helped Rust Pete and Slag get into Captain Darkwater's ship, he double crosses Ratchet when saying he will search for "booby traps", which is a trap just for Ratchet. With Rust Pete jamming Slag's head onto Darkwater's body, a curse that even Pete did not know is triggered. With Darkwater saying "I forever bind me soul to me body", as Captain Slag is activated, he begins talking but is interupted by Captain Darkwater, who now also is activated again. The two begin fighting over the body until Rusty pete says they "need a good pillaging". Captain Slag is seen in a few cutscenes mokking Ratchet alongside Captain Darkwater. He is eventually fought on Darkwater's fleet whenever Darkwater doesn't use his "ghost form".

After Darkwater's defeat, Slag is seen again as "Slag on a Stick" stuck at sea with Rusty Pete on a crate. Slag tells Pete, who had been narrating Quest for Booty's story, he didn't want to hear the story the first time. Pete tells him there's "no need to get cross", to which Slag says "I'll quit yellin when you find me a new body! Now start rowing!". Pete then rows at Slag's command and the two start heading towards Hoolefar island.

Appears in

 * Ratchet & Clank Future: Tools of Destruction
 * Ratchet & Clank Future: Quest for Booty