Originally, Lewis just referred to Dr. Linksano as "the Dr. Insano from another universe", but fans really latched onto the name "Linksano", so he ran with it. Likewise, "Mechakara" started off as a Fan Nickname before being officially adopted by Linkara.
Lewis's commentary on his Power Rangers #1 review reveals that he did not originally plan to use the gun acquired from Cable to defeat Mechakara, and that he put it in specifically to fulfill the fans' expectations of it having been a Chekhov's Gun.
"Mechakara" was originally a Fan Nickname. Linkara and allies call him this, he never uses it himself and neither do his allies on Lord Vyce's team. In To Boldly Flee, his ally Terl calls him "Mechakara", but they didn't know each other well.
Big Name Fan: In comic book and Power Rangers fandom. He is a member of Power Force, an exclusive group created by Saban Brands, comprised of Power Rangers's biggest fans, and receive exclusive benefits and first looks.
Creator Backlash: Linkara is embarrassed by the self-published novels he wrote in high school. Whenever they're brought up, he ends up asking that people don't track down the first two and only look for the third, which he is the least embarrassed by.
Dawson Casting: Some commenters complained about the casting of the girl playing Margaret (the Magic Gun) in Psychoman #1 as an example of this, pointing out that when her backstory had been given in the Silent Hill reviews she had been said to be 13 years old when she died. Linkara replied the actress was actually 14, and apparently Younger than They Look.
For Linkara himself, its confirmed on the DVD's behind-the-scenes extras, where Lewis guesses his age at about 12-16, despite his creator/actor being in his mid-20's. Lewis decides that it's just keeping with the tradition of 90's kids' shows like Power Rangers using twentysomethings to play teens.
Fan Nickname: Each of the Mirror Universe characters have one.
Hey, It's That Guy!: Mightily Murdered Power Ringers was written by Eisner-nominated comics writer Nat Gertler (who puts in a Cameo) and drawn by Sinfest creator Tatsuya Ishida. Linkara himself is visibly shocked when he learns this, and the credits remark that it's just proof that nobody produces good stuff 100% of the time.
An even more insane example: In his "New Guardians #1" review, we have Snowflame appear, being played by Lewis' real-life friend Will Wolfgram. ...aka: the guy who played Lord Vyce.
A drunken Linkara ranted about Booster Gold's Character Derailment in JLA: Act of God to Dan Jurgens in the stinger of the "Sir Charles Barkley and the Referee Murders" review.
For the 200th review, flipping SF Debris had a cameo.
Hey, It's That Sound!: He uses sound effects from the Descent games to good effect in the story arcs, and especially during the climactic battles. Many of them match events in the scenes that would trigger them in the games.
I Knew It: The Entity turning out to be Missingno. While there were hints dropped, Lewis states in the Electric Tale of Pikachu commentary that he was shocked by how many fans figured it before he revealed it.
Then, there are his self-published novels, which, while not nearly as bad as above examples, still show that Linkara has come far as a writer since he wrote them (on the bright side, they contain what may well be the origin of his nickname).
He admitted during Magfest 9 that the early chapters of Lightbringer were written when he was "young and opinionated", saying he'd even given up on editing them.
Many of the comics he reviews are the Old Shame of good writers, or at least are bad writing by good authors. Especially Fabian Nicieza. Nat Gertler actually appeared on AT4W to admit this of Mightily Murdered Power Ringers.
In the commentary of the Bimbos BC movie, Brad Jones revealed that the director was actually a good friend of his. When Brad went to the guy to let him know that he and Linkara were going to review the movie, said friend's response was reportedly, "Good Lord, why would you want to watch that?" The two go on to point out that he was about 16 when he filmed it.
One of Us: During The Situation, Linkara urged many on his Twitter to help support TV Tropes by buying the merch. During his "Top 15 Screw Ups" video, while addressing his mis-pronunciations he put up the discussion of just that from this page's Headscratchers page.
In Pollo's first appearance, he was voiced by Microsoft Sam, but the voice source was later changed to Speakonia's "American Male #1".
NIMUE was once voiced by Obscurus Lupa rather than her usual voice actress, after Linkara needed some extra lines recorded on short notice.
Possessive Author: He wouldn't let Mechakara be a character in any of the Channel Awesome movies until To Boldly Flee, due to the fact that Mechakara is a serious character who would sooner snap everyone's necks than crack a joke. Doug respected this and wrote him as a Knight of Cerebus.
Real-Life Relative: His parents, brother, and girlfriend have appeared on the show numerous times.
Throw It In: Linkara's commentary for review of the Power Rangers comic notes that in his morphing sequence his glasses reappear and notes that it is excusable by the fact that that kind of thing happens in the original.
According to his commentary he had planned for The Entity to appear as multiple 90s Kids speaking over each over. He also states that he originally planned to fight The Entity with a Quasar Saber, but decided on Talking the Monster to Death, realizing that after all the build he had given it that Linkara killing it in a straight up fight would make him too much of a Mary Sue.
Another scrapped idea for the The Entity finale was to reveal that The Entity actually wanted to become an Elder God and would journey to the city of R'lyeh, only for it to discover all the Elder Gods died of boredom long ago.
The original plan for the "Linkara Lost" story arc would have had fans submit their own AT4W episodes, but it was instead replaced with the supporting characters doing the episodes.
Lewis was approached to make a movie for The Uncanny Valley, but had to decline because he was making an AT4W DVD.
In the "Guns and Sorcery" arc, the original reason Linkara's magic stopped working was because the Magic Gun was getting jealous of the Arsenal of Freedom.
Harvey Finevoice was going to have his own spinoff where he reviewed event comics.
Word of God: After Holokara is defeated, the Gunslinger is seen entering Linkara's house and picking up the hard-light projector. However, Holokara is not seen in the final confrontation with him. Its confirmed that he forgot about it, and by the time he remembered, it was too late to film and edit new footage involving it.
According to NIMUE, her statements of "Information" are a Shout-Out to Zen from Blake's 7.
Lewis is the only member of the "TGWTG Big Three," (The others being Doug and Noah) who doesn't have his own TV Tropes Creator page.
As of the 300th episode, a fourth has been burned: Frank Miller's Holy Terror.
As of the June 29, 2014 livestream, the top ten fan favourite episodes are:
10) Warrior #1 9) Silent Hill: Dead/Alive #5 8) Justice League: Cry for Justice #5-7 7) Countdown, Part 2 6) Marville #4 5) Superman at Earth's End 4) All-Star Batman #1-2 3) JLA/Titans: The Technis Imperative 2) Pokemon: The Electric Tale of Pikachu 1) One More Day
Lewis noted that Warrior #1 actually placed 9th in the fan vote, but because technically it's an episode of The Spoony Experiment (albeit one with AT4W storyline implications, and one that is included with the "normal" AT4W episodes on the new site), he moved it to 10th in the countdown.