Holo-Kara, as he is called by 90s Kid, or Fake-Kara, as he is called by Harvey Finevoice, is a holographic copy of Linkara, who originally created it to serve as a distraction when fighting off against the monsters of Silent Hill. He then had it serve as his replacement for when the real LInkara went to search for the mystery of why his magic gun and magic in general wasn't working.
History
Holo-Kara is basically the same as the normal Linkara, doing reviews that his creator programmed him to do. However, during his review of Rock 'n' Roll #31, 90s Kid does his usual shtick and interrupts the review to show his bizarre standards and what he finds awesome. At the end of the review, Holo-Kara warns 90s Kid to not interrupt his review again, but the idiotic child believed that his presence is what kept the show going, to which Holo-Kara responded by phasing through his chest and grasping his heart. Holo-Kara then threatens to hold it until it stops beating if 90s Kid attempts to interrupt again before letting go, much to 90s Kid's shock and horror. Later, Harvey Finevoice, having heard about Holo-Kara's attempt on 90s Kid's life, confronts the living mirage, seeing that something has gone wrong in its programming. When Holo-Kara threatens Harvey, the latter opens fire on it, but the bullets merely go through him. The hologram then shoves him back, warning him to pay him more respect the next time they meet.
Holo-Kara continued his duties, reviewing bad comic after bad comic until Marville #3, which enraged him enough to resort to alcohol and somehow get drunk despite being a hologram. Drunk, he went to sleep after the review, at which the others plan to destroy him in order to survive. Their plan is basically to shoot Holo-Kara with rapid-fire waepons in the hopes of overloading the forcefields that protect the mobile emitter so they can destroy it and Holo-Kara.
After Holo-Kara reviews the Tandy Computer Whiz Kids: Answer to a Riddle, Harvey and 90's Kid attack him with the tommy gun and chaingun respectively, until the chaingun runs out of ammo and 90's kid resorts to using the (newly recharged) BFG. Dr. Linksano and Pollo hide behind some boxes and try to help them by hacking Holo-Kara, but he uses a backdoor built into Pollo's body (that Holo-Kara himself provided) that disables him. After ranting about how hopeless their situation is and how "No one can stop what [he has] started here." Linkara shows up and shoots him with his Magic Gun, effectively dropping his shields. Quipping that he "might know somebody".
Holo-Kara attempts to explain the situation, but Linkara already knows the whole story thanks to Pollo reporting to him via a short range communication system. Linksano attempts to warn Linkara about Holo-Kara's ability to manipulate his holographic visage, but Linkara simply tells the apartment's computer to deactivate him, showing that it was horrifically easy to defeat Holo-Kara.