Genderbent Royal Woods are the genderbent versions of the characters who appear only in the episode "One of the Boys". At the end of said episode, it's revealed that none of them are real and they are just a bunch of fictional creations made by Lincoln, as the events of the episode were just part of a really weird nightmare that Lincoln was having.
Like Lori, Loki wears a blue tank top, brown shorts, and blue shoes. He also has two chin hairs. Unlike Lori's eyebrows, Loki's eyebrows are yellow instead of black.
Loki seems to have the same personality as his brothers: unsophisticated ruffian, as the trivia for the episode itself states. He is selfish, greedy, and is very bossy around the others. He is also mean and abrasive towards Lincoln, and mocks him for Luke using him to clean the toilet, Leon for biting his thumb when he gets a "boo boo", and teases him about Ronnie Anne. Arguably, he isn't the rudest of his brothers, but he is annoying enough.
However, in the world where he and the brothers have a sister named Linka, Loki and the other nine brothers are shown to be very caring and protective of their sister--in fact, Loki's the first of the brothers to ask Linka (technically Lincoln-in-Linka's-body) if she's okay after the brothers heard her screaming in the middle of the night.
Like Leonardo, Loki is also the oldest brother, and also wears blue.
Like Chris, Loki also wears blue, and has blonde hair.
According to the Loud Brothers model sheet, Loki's girlfriend (and the female counterpart to Bobby Santiago) is named Bebe. Making fun of Lincoln for going to date with Ronnie Anne makes him a hypocrite, or probably he's not dating anyone due to his rude attitude.
He is the only Loud Brother that has facial hair.
Unlike his female counterpart Loki has blond eyebrows, he is the only Loud Brother to have that distinction from his female counterpart.
His Polish name is Hugo, which means "Bright in Mind and Spirit" or "intelligence."
Loki's Latin American dubber, Luis Fernando Orozco, is the elder brother of Alejandro Orozco, who voiced Freddie Benson (Nathan Kress) from iCarly.
Unlike Leni, Loni's blond hair is shorter, and his sunglasses aren't as circular. Instead of wearing a dress, he wears a light green silk sweater with a white long-sleeved shirt underneath, dark blue jeans, light green socks with white spots, and brown dress shoes.
He's goofy like Leni but unlike her he's not sensitive so when his brothers get hurt he doesn't care about it. He laughs from Lincoln's relationship with Ronnie Anne and how he suffers physical pain. This contradicts caring and kind personality of Leni.
However, in the world with Linka Loud, Loni and the rest of the brothers are shown to be very caring and protective of her--in fact, Loni's the one who makes the offer of the brothers staying with her until Linka falls asleep after they hear their sister screaming in the middle of the night.
In contrast to Luna, who has a pixie cut, Luke's brunette hair is styled into a faux hawk. For his clothing attire, he wears black checkered pants, as well as a blue vest with a purple t-shirt with a skull on it underneath, which is similar to Luna's. Like Luna, Luke also wears purple boots and a grey belt wrapped around his pants. Also like his female counterpart, Luke also has freckles on his face. He also has the same paper clip earrings Luna has.
Luke's hair is the same as one of Lincoln's classmates from "Save The Date"
Luke is an aspiring rocker; however, he is shown to be rude, and abrasive toward Lincoln, which completely contradicts how Luna is very caring towards Lincoln, as he uses his head for cleaning the toilet. It is also mentioned that he flushed Bun-Bun down the toilet.
However, in the world with his sister, Linka Loud (Lincoln's female counterpart), Luke's shown to be very caring and protective of her--it's possible that Luke and Linka have the same kind of relationship that Luna and Lincoln have.
While Luke is an aspiring musician, his voice actor Greg Cipes actually is a musician. He is a member of two bands: Cipes and the People and Super Space Fighters.
He is the only Loud Brother to have his ears pierced.
His piercing is, or looks like, a paperclip.
His Polish name is Hipolit.
He looks similar to Brad Buttowski from Kick Buttowski, which Chris Savino also worked on.
As opposed to Luna's guitar color being purple, Luke's guitar is colored blue.
Rarely, in the Polish dub, Luke is voiced by the same dubber who voices Luna.
Luke's Latin American dubber, José Antonio Toledano, also voiced Chuck (Bridge Palmer) from iCarly. He's well-known to voice Finn the Human, one of the protagonists of Cartoon Network's Adventure Time.
Lane looks similar to Luan Loud, as they both have braces and brown hair. However, his hair is cut shorter and is parted at his forehead. For clothing, he wears brown shoes, white socks, a white, short-sleeved, button-up shirt, a pink bow tie, and yellow plaid shorts that held up by red suspenders.
Like Luan he's always tells jokes but unlike Luan he's rude, rough, harsh towards Lincoln, he seems to be playful, he's goofy like Luan, he likes to call he's siblings names and like the other brothers he's snooty and nothing but a brat. In Linka's universe, though, he seems to be very caring towards his only sister.
Lane's voice actor Rob Paulsen also voiced P.J. from Goof Troop, Donatello from the 2012 Teenage Mutant Ninja Turtles, Carl Wheezer from The Adventures of Jimmy Neutron: Boy Genius, Ian Wazselwski in Disney's Teacher's Pet, and Yakko Warner from Animaniacs, who are all older brothers.
His voice sounds similar to Captain Mike and Bacon Bill from VeggieTales in the House.
Lynn looks like the other Lynn. He wears a red and white jersey shirt that has the number 0, red and white shorts, and cleats. Unlike his female counterpart, he doesn't have a ponytail and his jersey has the number 0 instead of 1.
Like Lynn he's rough, aggressive, and mean towards Lincoln. Basically he's just like Lynn but harsher and he's more like a dumb jock who doesn't care who gets hurt not even his own family. He also laughs whenever there's pain. But in the universe with Linka Loud, he's shown to be very caring and protective towards his sister.
He is the only older brother to be voiced by the same actor as his female counterpart (in other words, he's the only older brother to be voiced by a woman).
Boy Lynn is the second male that Jessica DiCicco has voiced on the show. The first one being Zach. The third being Lars.
Much like their female selves, he and Lars both share the same voice actress.
He is the only male Loud child to share the same name as his female counterpart, since "Lynn" is technically a unisex name (although it is more common as a girl's name).
Lincoln thinks he's the only brother who's exactly like his female counterpart Lynn.
He can pick his nose with his big toe.
His Polish name is Hektor.
He is only brother who is voiced by the voice actress of his female counterpart in the Brazilian version.
Boy Lynn is Latin American dubber Monserrat Mendoza's first male role.
Like Lucy, Lars wears all black and his black hair covers his eyes. However, his hair isn't as long as Lucy's. He wears a black t-shirt over a white turtleneck with black stripes, black pants and white and black shoes.
Like Lucy, Lars is a goth and likes to attend funerals but unlike her, he is rude, aggressive, thoughtless and doesn't care who gets hurt and he's willing to hit anyone who damages his coffin even his own family. But in the world with Linka Loud, Lars seems very caring and protective of his only sister, just like the rest of the brothers are.
Leif looks like Lana by wearing a red baseball cap facing backwards, white sneakers with blue stripes, and blue overalls. Unlike his female counterpart, Leif's blonde hair isn't styled into pigtails. Leif, unlike his female counterpart, is missing his canines instead of his incisors. He also isn't wearing a shirt underneath his overalls. Also, his overalls are shorter than Lana's overalls. His hat also appears to have a more rectangular hole, compared to the more round hole on his female counterpart's hat.
Like Lana, he's rough and messy. Like the Loud brothers, he is rude, aggressive, mean, harsh and always likes to dog pile on anyone no matter who it is. However, in the world where the brothers have a sister named Linka, Leif and the rest of the brothers (including Lexx) are shown to be just as caring and protective of her as the Loud sisters (including the twins) are of Lincoln.
Unlike his female self, Lexx doesn't dress like a princess, instead he seems to dress like a king or a prince. He wears a white long-sleeved t-shirt tucked into his dark gray pants, supported by a brown belt, a pink scarf, a pink socks, brown boots and matching brown gloves. In contrast to Lola's tiara, Lexx wears a yellow crown with an emerald in it. As opposed to his female counterpart missing her incisors, Lexx is missing his canines.
Like Lola, they're both spoiled brats who have anger issues but unlike Lola, Lexx is more like the Loud brothers by being harsh, doing dog piles, aggressive and he makes insults not even Lola would do. But in the dimension with Linka Loud, Lexx and the rest of the brothers (including his twin, Leif) seem to be just as caring and protective of their sister as the Loud sisters (including the twins) are towards Lincoln.
Just like Lisa, Levi wears large glasses to help him see. Unlike his female counterpart, Levi's brown hair is cut shorter, and he wears a science lab coat, with green gloves, instead of wearing a green sweater.
Like Lisa, Levi is a child prodigy, and speaks using really big words, but unlike Lisa however, Levi is shown to be harsh and uncaring towards Lincoln, as shown when the boys mock him after Luke uses him to clean the bathroom, and teasing him over wanting a date with Ronnie Anne. He is also harsh towards Dad, as the boys plow him down whenever they see him.
In the world with Linka Loud, Levi seems to care a lot about his only sister, just like the rest of the brothers do.
Much like his female self he has light blonde hair and usually wears only a diaper most of the time. However, unlike Lily, his hair is shorter and has more teeth. He also doesn't have any eyelashes like his female counterpart.
Not much is known of Leon's personality, but despite his young age, he appears to be just as mean as his brothers, as shown in how he bit Lincoln's finger when the boy wanted comfort. However, just like the rest of the brothers in the world with Linka Loud, Leon seems to care a lot about his only sister.
She looks a lot like Lincoln but unlike her male counterpart, she wears a blouse (as opposed to a polo shirt), dark blue skirt and has much longer hair with an orange hair clip in the front. She also wears white earrings similar to Lola's. Her toenails are also painted pink. She appeared only barefoot in the episode, but in concept art she wears red shoes and white knee-high socks.
It's unknown what kind of personality Linka has--she only appeared in one scene of "One of the Boys," and it wasn't really the real Linka, it was more Lincoln-in-Linka's-body. However, if it had been the real Linka, it can assumed that she probably has a similar personality to Lincoln and has some of the same interests, such as comic books, videogames, coin-collecting and ARGGH!.
Linka seems to really like stuffed animals (besides Bun-Bun), as there are many other stuffed animals in Linka's room, in lieu of the action figures that Lincoln has in his room.
Much like her male counterpart, she is also voiced by Collin Dean and their respective foreign dubbers. She is the only one to be voiced be all the same actor as her counterpart in all dubs.
For the Latin American, Hebrew, Polish and Hungarian cases, they would be their first female role.
In her original design, her hair was styled into two downward pigtails that were similar to Lana's hairstyle.
Girl Clyde looks similar to the male Clyde. Like Clyde, she also wears glasses. However, her hair is slightly longer and has a blue ribbon in it. She wears a yellow short-sleeved dress with a single, horizontal, white stripe going down the middle. She also has purple hoop earrings.
The dimension with Linka Loud seems to be more or less exactly the same as Lincoln's original world, as the brothers are shown to be just as caring and protective (if not more so) of their only sister as the sisters are of their only brother.
Only Rita and Lynn Sr. remain their original genders. However, they wear each other's colors.
Ronnie Anne also stayed the same gender, when Lincoln mentioned that she had the same name, and his brothers still treated him like she was his girlfriend. It's unknown who Ronnie Anne's counterpart is in the dimension with Linka Loud.
All of the Loud Brothers act personality-wise as Lynn Loud, being insensitive, rough and rude towards Lincoln without caring of who gets hurt, this is due that Lynn's personality is the closest thing that resembles a boy from Lincoln's perspective given his relationship with her.
But unlike them, Lynn cares deeply about her siblings (including Lincoln) while the Loud Brothers treat each other harshly to the point of dog piling their dad.
Not only do the characters switch genders, but toys do too. Mr. Coconuts now goes by "Mrs. Coconuts", and she has a ponytail, a bow, and a dress, and the Princess Car is now camouflaged, and has an angry face with sharp teeth.
The counterparts of the 4 oldest Loud siblings are voiced by the 2012 Teenage Mutant Ninja Turtles actors: Seth Green (Leonardo) as Lori's counterpart Loki, Sean Astin (Raphael) as Leni's counterpart Loni, Greg Cipes (Michelangelo) as Luna's counterpart Luke, and Rob Paulsen (Donatello) as Luan's counterpart Lane. However, since they're not related, its not the same thing in other international dubs.
As for the other 7 Loud siblings, their counterparts each share the same voice actor/actress as them.
In some other cases, almost all of the brothers are voiced by male voice actors.
Coincidentally enough, Rob Paulsen has also voiced male counterparts of two of the main characters in The Powerpuff Girls (Boomer and Brick), a show that Chris Savino was also involved in.