You do realize that the whole "they get a magical suit and is suddenly able to fight" part of fiction is total bullshit right? Like, as much as I love Tokusatsu or anything Superhero related, that's the one part I have a problem with.
Just because it's fiction and "anything can happen" doesn't mean it HAS to throw away logic. And just because it's fiction, doesn't mean it can't be good fiction (that's why literature classes are important). I'm not calling out Tsukuyomi only. This was just the last straw for me, in a sense when it comes to the amount of bullshit they do. The suit doesn't make you have style though. All it does is enhance your power. At least, with a character like say, Wataru, it makes sense in Kiva that he has some supernatural strength, and that the Kiva armor is more of a mystical transformation that alters his body. Plus, he's had it for years. Tsukuyomi is just a human with time powers. That's kinda it.
Let's take a look at all the Heisei examples then;
Kuuga - Godai has over 2000 skills, pretty sure some of that included mastering some type of martial arts (he did Kendo for Titan form's abilities and even practiced jumping and spinning mid air kick)
Agito - It's a mystical/spiritual power that takes over you, Shouichi even showed signs of being overtaken by some kind of "instinct" that is almost like a personality change.
Gills - Ryo was an athlete swimmer, who also picked fights with people a lot. His fighting style as Gills makes sense since it combines his pain with his animalistic behavior.
G3 - Hikawa is a trained police officer.
Another Agito - Like the previous Agito Riders, supernatural powers and it seems that anyone who becomes an Agito has the animal-like instinct to fight.
G4 - He's a soldier.
Ryuki - Shinji isn't an expert fighter. He slowly grows. Just look at his initial appearance.
Knight - Ren probably a punk much like Ryo.
Zolda - He doesn't do a lot of hand to hand combat either.
Scissors - it's been established he's a serial killer. Dude probably knows enough ways to overpower enough people, doesn't mean he's great at it. but swinging a claw around as your weapon doesn't require much training.
Gai - Makes no sense, but okay, Ryuki needs padding to market 13 toys.
Raia - Makes no sense still, but okay, 13 Rider toys.
Ouja - Asakura is pretty much a violent person, I'm sure this is perfectly valid.
Verde - dude's a rich businessman. I'm sure he has access to trainers and what not. Still doesn't excuse a lot of the stunts he's able to pull off.
Tiger - Houjo was all "I'm a hero stuff" it's not crazy to think he'd actually dedicate his time to training.
Imperer - Another hard case to believe, but hey, 13 toys.
Femme - okay, I'm inclined to believe it in a sense, she's been shown to be kinda street smart and clever, but her actions are all too bombastic either.
Ryuga - Mirror world character, he's not human.
Odin - Overseer of the whole thing, plus he barely has a style.
Faiz - Takumi was established as an adroit. He picks up things easily. Plus, as an Orphenoch he's probably fought his fair share, and as a human too.
Kaixa - Kusaka trained a lot for excellence. Valid.
Detla - Yeah, Mihara kinda isn't. Cause Mihara, but at least his fighting style reflects his personality too. It's not as graceful as Kitasaki.
Psyga - He's part of Smart Brain. Pretty sure he's up there in getting his routine, plus Orphenoch.
Orga - Kiba spent his whole life fighting after becoming an Orphenoch. It's not far of a stretch.
Blade - Trained by Board.
Garren - Trained by Board.
Chalice - Undead, born to fight.
Leangle - Mutsuki was under the Spider Undead's influence. A lot of that probably bled into his own personality as well.
Glaive - Tachibana's new division of BOARD, of course he'd be trained. Plus Albino Undead.
Larc - BOARD.
Lance - BOARD.
ALL Hibiki Riders - they have been shown time and time again that they train.
Kabuto - Tendou is Tendou.
TheBee - all it's users have been shown that they have some level of training.
Drake - not sure how a make up artist knows how to fight actually.
Sasword - Tsurugi is from a family with a legacy. Jiiya probably taught him a few things here or there or he learned and took lessons.
Gattack - character development, plus he's always struggled to become stronger.
KickHopper and PunchHopper - Went to hell.
Movie Riders - They're either Zect or Neo-Zect.
Den-O - Ryotaro doesn't even come into his own until the end and left all the fighting up to the Taros.
Zeronos - He's strong. Somehow, that's part of his character. Also, when he appeared, it looked like he summoned lightning for his debut, and that was never explained again.
Gaoh - Timejacking before it was Zi-O.
Nega Den-O - Imagin.
Yuuki - This dude's supernatural.
New Den-O - He's strong that's part of his character, like Zeronos (by the way, if you haven't noticed, everytime I say being "strong" is part of their character, it's sarcastic and meant to mean it doesn't make sense. Just as much as "strong female characters" where their only defining quality is how physically strong they are). And there to look like the opposite of Ryotaro.
Kiva - already explained that above.
IXA - Trained Fangire Hunter.
Saga - King of the Fangires, a race that preys on humans. Yeah, this explains itself.
Dark Kiva - Armor of the Kings, anyone?
Rey - agent of an organization.
Arc - Possession-ex-machina.
Decade - Well, it's Decade.
DiEnd - Whatever Decade does, he rolls with it, somehow.
Kivala - Because we needed a place where the inception of the Tsukuyomi incident happens.
Abyss - Undead.
W - I'm pretty sure two souls fighting together somehow gives the body certain abilities it didn't normally have. Plus, Phillip learns quickly, and Shotaro is trying to be hard-boiled.
Accel - Cop.
Eternal - NEVER.
Skull - Hard-boiled badass detective who occasionally puts his life on the line to solve crime? I'll let this one slide.
OOO - Okay, this one might not pass. Eiji was a hobo and peace lover. He wasn't established as an adroit like Takumi was, but living as a hobo day to day means he has to adapt, SOMEHOW. I think they stretched this one a bit too far.
Birth - Date kinda came out of nowhere, and seemed like a perfect fit due to his actor's fitness, despite the fact that Gotou is supposed to be one who was trained by the Kougami foundation.
Poseidon/Aqua - Future Kamen Rider before the Zi-O did Future Riders? Not much of an explanation here.
Fourze - Attempts at emulating high school themed punk? Yeah, I dropped this show after he got the Elek Switch, and the only things I saw are clips here and there, so I have no idea if Gentaro even trained or anything.
Meteor - Apparently he's supposed to be emulating Bruce Lee, which I find hilarious and annoying since it's so far off or trying too hard.
Nadeshiko - alien-space thingy?
Wizard - He's a magician, and honestly, I don't believe Haruto's actor can pull off those mid-air cartwheels his armored self could. So, Wizard lost me on it's believability, even if Haruto has to somehow constantly fight against his own despair.
Beast - Well... Nitou kinda has to SOMEHOW get good cause his life depends on it.
White Wizard - Well... Carbuncle Phantom anyone?
Secondary Wizards - Well, they're pretty much the RiotTroopers aren't they? I didn't even include RiotTroopers on this list, but I thought they were kinda bullshit.
Kamen Rider Sorcerer - well, Villain and Phantom.
Gaim - Kouta dances, and does parkour (at least his actor has experiences in it) Plus, he slowly comes to learn how to use the Sengoku Driver more efficiently.
Kaito - Grew up in a bad home, became an orphan, had to fight his way through life.