DOOMSDAY

DOOMSDAY is a sentient, malevolent computer virus and the central antagonist of the Super Mario World ROM hack Daymaker: Release from Doomsday. It was created by Twitter user @Plasma3031 on March 30, 2022.

Biography
DOOMSDAY was created through unknown means by hackers on the dark web, aiming to sow chaos among users of the "light" web by bricking their machines. As a simple sentient virus, it has no gender, name, age, or true appearance, operating mainly through stealing and copying the forms and data of others.

Despite being a mere virus, DOOMSDAY displays personality traits comparable to that of a sociopath; it is cold, calculating, and single-minded on its mission, and will stop at nothing to see that goal through, no matter who or what it has to cut through to see it done. The only thing it truly cares about is itself and its own survival. Additionally, DOOMSDAY displays some sadistic, unhinged traits as well, often mocking or taunting the helpless user of a system it has infected, inviting them to watch it destroy their beloved technology.

Abilities
DOOMSDAY is capable of entering a piece of machinery like a computer or game system electronically through power cords connected to them, slipping inside a machine covertly and quietly. Through its unending hunger, it can destroy a system in mere hours, leaving it completely and utterly unusable as the virus slinks away unscathed to search for more data to consume. When entering a video game it can infect and take over a component of the game, usually a central antagonist character. It then uses this form to disable or otherwise incapacitate any defense systems the game or system has before carrying out its ravenous schemes.

DOOMSDAY will inherit any strengths and abilities of hosts it possesses.

Weaknesses
Due to being a computer virus, it cannot enter the physical realm and thus poses no threat to human life. Additionally, its infection can only affect one computer, system, or game at a time, and must wait until its current "meal" is completely destroyed before it can move to another. Because DOOMSDAY requires data to survive and travels through electronic cables and cords, it is possible to starve it to death by allowing it to infect a piece of technology like a computer before disconnecting it from any and all cables, leaving it to feast on the data none the wiser and slowly die within the trap. An antivirus can also destroy it, but only during the early stages of the infection; antivirus programs deployed later may already be consumed and taken over by DOOMSDAY, intentionally throwing a false positive to trick the user into thinking nothing is wrong, while the system is still being destroyed. It can also be destroyed by taking out its current host body; if the body it possesses is destroyed, it will be annihilated with it.

While it can copy the data, minds, and memories of hosts it infects, it is also forced to inherit the host's personality, which often interferes with its mission in some way. This can be exploited to defeat DOOMSDAY. For example, while possessing the Bowser within END.smc's Super Mario World cartridge, it unknowingly inherited the fondness Bowser had for Princess Peach, and thus was unable to harm Jennifer Mays. DOOMSDAY also inherits any weaknesses its host possesses.

Trivia

 * Despite typically being solely focused on its task, DOOMSDAY possesses an irrational hatred for the AI Daymaker, loathing his persistence and determination to continue fighting against it, which ultimately proves to be its downfall.