There isn't one, really. Because that's what makes them identifiable as Kamen Riders to the public. There's no other reason, save it's the best for the suit actor. I'd argue that neither Gaim or Ex-Aid have bug eyes in the traditional Rider style (Ex-Aid is obviously cribbing SD Gundam). Ryuki's supposed to be a dragon.

Probably because of traditional. Though you're slightly wrong on a few things
Kuuga: Bug, Stag Beetle
Agito: Bug, Stag Beetle
Ryuki: Not a bug, but you'd see the knight-like thing instead
Faiz: Not a bug, but stylized helmet to resemble, well, the Phi symbol
Blade: Bug, Scarab Beetle
Hibiki: No Bug eyes
Kabuto: Bug, Rhinoceros Beetle
Den-O: Not a bug, but the eyes are shaped like a peach, which is another reference to Momotarou, Rod form has bug eyes, but that's more likely because of the turtle motive as some turtles have spots on their shells iirc
Kiva: Not a bug, but stylized like a Jack-o'-lantern
Decade: Not a bug, but he's supposed to be the anniversary thing
W: Bug, and W as a whole is a shout out to Showa
OOO: Occasionally a bug, but they likely kept the bug eyes to save on helmet designs
Fourze: You win
Wizard: No bug eyes
Gaim: Not a bug, It's stylized like samurai armour
Drive: Not a bug, stylized as a car
Ghost: Bug Firefly, but no bug eyes
Ex-Aid: No bug eyes

Decade's suit was different, the actor would have to look through the barcode instead of the eyes iirc, they showed it in a net movie

Agito's actually a dragon, not a beetle.

Pretty much right about the rest though.

His horns before using a finisher always reminded me of stag beetles, my bad

Agito's horns always made me think of a frilled lizard. I have a hard time seeing the dragon.

WOW. That's nuts! Is Decade's design a barcode? I thought they were supposed to be polaroids to go along with the camera belt and history motifffff. ;}
I still haven't finished Decade; it's not terribly compelling.

"Kao ga barcode"
Decade Eyecon. So yeah. And Decade is trash anyway

I thought we just established he's a barcode? :p

sunnova-
Well played Fishy Friendo!

Well, I'm kind of jumping the gun, but I would really like to see what happens when you use Gekitotsu Robots, etc. in the Lvl 1-2 slot and what Mighty Action X, etc. does in the Lvl 3+ slot.

Mostly because I know it won't happen. Oh well, Sailor Earth fuel for days right there.

True story Agito's actor also mistook his hero's motif as a stag beetle. It happened in a talk show a long time ago.

The eyes are never actual lenses for the suit actor. The real lenses are easy to spot on Showa suits - they're the small black "tears" next to the big bug eyes.

Isn't Stronger's eyes riddled with obvious holes, though?

Though yeah, the tears are hella obvious on a lot of characters. V3 especially.

There are some early episodes of the original show where you can very clearly see the suit actor's eyes through the tear lenses. I'm not sure if they had separate stunt helmets and close-up helmets back then, but if they did I suspect they didn't remember to swap them out every time.

Yeah. I think it's the same method they used for Goranger's helmets.

Unfortunately, they made the holes even more obvious by making Stronger's eyes frickin' enormous.

The same effect when the NES doesn't recognize the cartridge.

No kidding. Of all the things that went unexplained in Decade (read: everything), Narutaki was definitely the most baffling. Especially come Kamen Rider Taisen when he's suddenly changed sides.

On the topic of Decade and bugs, isn't he based off a pink striped shieldbug?

Oh, yeah, apparently the Blaster from Faiz is supposed to be compatible with all the belts, at least in the S.I.C. storyline it is, so that'd be cool to see.

Oh, and the Kaixa Break thing I keep seeing images of.

I want to know how upgraded forms would look for non-universal upgrades. S.I.C toylines usually cover that, but how would say, Femme Survive, Hyper Drake, or even Accel Trial Booster?

Well, I'd assume Femme Survive would look a lot like Knight Survive, just based on parts re-use. Maybe with smaller shoulder pads, on top of the obvious changing all the bat motifs to swan ones.

No idea on the others.

So what was up with takeru's exorcist hugs? Like we're those related to the mugen form?

As much as anything in Ghost was related to anything, I guess.

What I want to know is what happened to Ryu's spirit. Around the time Boost first showed up, there was a line mentioning that Takeru wanted to revive his father as well as himself...and it never came up again. Granted, it's Ghost, so I don't think it was "unrevealed" so much as "the writers forgot, because it's Ghost."

Kabuto and Den-O. I used to have a whole list of questions, but I sort of gave up over the years after hearing different people theories and coming up with mine, but I still love Kabuto.

According to official statistics and stuff, Genm Zombie Gamer has a surprisingly large amount of equipment, but one thing he's able to do that we never saw was how he can shoot steam out of either his shoulder or mouth, not too sure.

Genm's Zombie Gamer looks really badass. Hmm.....this is one of best form in Ex-Aid series...

About Rider abilities, I am really curious to some of unsed powers...

Yeah, in the past, we has many Rider powers but not yet used. Like Leangle Jack Form, some of unused sounds in DX Wizard Driver (Note, Speed Up, Barricade, etc), some of unused medals in OOO Scanner (Mukade, Hachi, Shirokuma, etc)

Oh I am remember, in CSM Decadriver, this toy has Neo Heisei Card sounds from W to Drive.

Den-O and Kiva got some unused finishers as well if you're talking pre-collectible gimmicks.

If Hibiki was a thing at least two years ago I bet we would have YouTube side stories about the other Onis through out Japan. Yes we had Danki, Eiki, and the one and only Sabaki the punchbag but would have loved to see how other onis handle the makamous. Probably could have done a collabo with tourism organizations, etc.

Kiva Emperor's Mermaid gun thing got a finisher in Battride War II, so there's that at least.

I think they might have given Den-O Climax his missing finisher too.

Also, from what I heard they had more plans for Dark Kabuto, since an early scan had this whole volcano seen planned or something.

So long as there's no Hyper Zabee.

I don't need a Wasp based hero/villain traveling through time.

Hmm...About Kiva, 3 aditional Kiva 's forms (Kiva Garuru Form, Kiva Bassha Form, and Kiva Dogga Form) also never uses Darkness Moon Break Rider Kick. I think Darkness Moon Break Rider Kick has other variation when this finisher used in other Kiva forms.

Hmm..Ixa Rising Form also has some unused abilities like:

- Laser Net Mode
- Scouter Mode
- Rise Blizzard Mode
- Flame Mode

Just like shonen anime openings, magazine toy scans usually spoil these plans early, but sometimes not all of them carry through. It's a cool series, but I think the different writers screw up Kabuto and I heard they ran out of budget at the end. Also, a lot of people find the characters pretentious.

We got 3 powerful worms(the worm with 3 lives, Sasword's scorpion worm, and Mashima) one after another after introducing the pointless native worm special near the last few episodes. It's just too much without any build up. I know there are good natives, but it seems all worms are evil except for sasword, but didn't the natives also kill their original humans counterparts. It's been a decade, so my memory is fuzzy. The natives that arrived in the 70s team up with the humans to create the zecters to defeat the worms that will be arriving in the 90's. Then they decided to convert the entire human race in to natives. Dark Kabuto was their first prototype. So Tendou just accept the natives to be co-existing with the human race. I prefer the movie ending over this with all the worms annihilated. Oh, they forgot about the future Hyper Kabuto or I guess his role is to show off his power to Tendou and fade away after Tendou obtain the powers. It seems Zect have no control of their own creations from choosing their owners and where did Hyper Kabuto weapon manifest from?

Kiva & Drive had a LOT of unrevealed finishers.

Basshaa Fever should've been used on Fangire King.

A lot of Tire Kakimazeru finishers were left.

That goes for Wizard too.

^they didn't even release more tire changes because no one wants to but those.

Something sprang to mind after GoRiders.
Blade King Form. The King Form we saw in the show wasn't what BOARD designed, but a combination off all the Spade cards.
So we never saw the "Real" (Though likely weaker) King Form.

I think basic King Form is only using King Form power (like Jack Form). SIC Garren King Form only using King Form power on his armor.