[quote=@Phantom Wanderer]
I had myself thinking about that as well, my biggest problems were Heavy Acceleration, the Roidmudes and the Makamou as well. Clock up isn't as much as problem as you think. Decade series proved us, one with an enhanced perception (Such as Pegasus Form Kuuga) can attack someone with this ability activated, I think in Kabuto episode 1 Tendou defeated a Worm in clock up while he was in masked form. Also in Kamen Rider Taisen, Stronger managed to land a hit on Kabuto with his electro kick. For Heavy Acceleration, there will be an organization aiding us, I'll get them to fetch us something made out of the same technology of the shift cars to withstand it. That leaves us with the Roidmude regeneration and Makamou problem, I'll still need to think about that though. Any suggestion is more than welcome. Great question by the way.
[/quote]

I'd say the poorly thought out crossover series that used alt worlds and changed things around to suit its purposes isn't the most reliable of sources. I could kind of see Pegasus Kuuga managing to catch someone using Clock Up if he timed the attack juuuuust right, maybe, except he tried to do it against an opponent that was just on a fast bike and couldn't manage it in his actual series, not to mention Pegasus Form is a huge boost to perception, so bad that Yusuke "I can do anything" Godai couldn't handle it on the first go and then could only hold it up for less than a minute because it shut down his nervous system from the strain.

Kabuto handling a Clocked Up Worm on the first ep was done entirely to showcase how badass he is and kind of total bullshit in that he's getting manhandled by the thing and then it just runs into the kabuto kunai because he could somehow see it coming by making a smokescreen and using shards of glass to create a laser pointer net, even though it was shown not a minute before that it could easily juggle Kabuto in mid-air, Tekken style, while it was on clock up and give him absolutely no chance to react.

Crossover movies that almost completely disregard character abilities in favor of showcasing them all are also hardly proof that Clock Up is readily handled by those without it, not to mention it was done because Stronger is a popular showa rider and the first to employ a rhinoceros beetle motif. And he was made to use some kind of electric attack made up for the movie that shut the ability down. In general, only other superspeed modes or similar should be seen as appropiate counters for Clockup, because every other instance is iffy and extremely situational.