DBTG

Info: Does Bad Things Guy was an evil identical twin brother of Brooklyn T. Guy in the SML series. He was the was the fill-in for Brooklyn between 2016-2017 from The Hitman! to his final main antagonistic appearance in The Secret Door!.

He was a serial killer who killed over 26 people (Including Bowser Junior in the SML Short Pinch! Pinch! Pinch! though his death was non-canon). He also returned in "Logan Tries To See The Super Marvin Galaxy Movie!" although his appearance cannot be considered canon, as it's actually in a video that was unfinished and didn't happen in-universe.

History: Does Bad Things Guy was born on August 21, 1977, in Brooklyn, New York, to Mr. Guy and Barbara Guy, along with his triplet brothers Brooklyn T. Guy and Doctor Me. Most of his childhood and teen years are unknown, but it's likely he attended and graduated from high school before his triplet brothers did. It’s implied that just like Brooklyn; he was heavily abused by his mother, though it’s possible she abused him worse than Brooklyn. Sometime before 1999, Does Bad Things Guy, like his family moved in Pensacola, Florida. At some point, Does Bad Things Guy moved in 763 Lake Ridge Lane (where the SML characters currently live) with his wife and daughter. He started his murdering spree on Halloween 1999, by killing his wife for unknown reasons and hid her in the secret door room. He would move out of the house but would visit it at times in order to keep the room a secret. After his first kill, some new people moved into his house and Does Bad Things Guy told them not to open the secret door. However, they opened the door anyways, so he killed them in order to hide his secret. Every time he did this, he would susquently dispose of their furniture, clean the house, and resell the house so the cycle can repeat. Strangely, he also took pictures of their dead bodies. At some point, he murdered an unnamed man at Thanksgiving by frying him in an electric chair, with this tale of his being told by Does Bad Things Guy himself.

From the events of "The Hitman!" to "The Secret Door!", he filled in for Brooklyn Guy for 7 months, doing his jobs for him. He would then sell the house on 763 Lake Ridge Lane to Mario and Bowser, along with the rest of the crew in The New House!. He would continue this charade until Jeffy opened up the secret door while playing hide and seek with Mario and Rosalina after hearing knocking from the door, attracting attention to it after he found out what was inside. Mario and Rosalina would then call Does Bad Things Guy to investigate it, leading Does Bad Things Guy to knock them unconscious while they were distracted so he could kill them, but not before explaining his plight to them. He would ultimately meet his death in "The Secret Door!" after tying up Mario and Rosalina as he was about to murder them, but the actual Brooklyn T. Guy returned from his vacation just in time to find where they were kept. He then shot Does Bad Things Guy once in the head just before he was about to murder Rosalina, putting an end to his awful life.

Personality: Like his brother, Does Bad Things Guy acted in a manner identical to him, being miserable and sarcastic, but it was likely this was a facade to mask his true personality. He was also shown to be strict since he did not allow people to open or enter the Secret Door.

In his final appearance, "The Secret Door!", he revealed his true colors, being evil, homicidal, violent, psychotic, sadistic, cruel, bossy, angry, dangerous, heinous and heartless. A complete murderous psychopath as he murdered his wife (for unknown reasons) and the previous houseowners as a punishment for entering the door that he told them not to open, showing him how heartless he really is.