There are several iterations of "Shockproof" going around.
And all are stupid.
If we make Shockproof complete immunity to all Electric-type moves, it becomes and inferior Motor Drive/Volt Absorb. I am going to come back to this point.
If we make it so that it works like Heatproof and reduces damage taken, but still makes you vulnerable to Electric-type moves, it's still worthless since you're still going to get paralyzed and you're still going to take some damage. In fact, Jolteon still 2HKOes you. MS Dos still 2HKOes you. All you're doing is making Gengar and Starmie take a little longer in shooting you down.
If we make it so that it is like the above but reduces speed loss from paralysis, then you're still going to lose 1/3 of the time, and you're still taking damage, and you're still being outsped by some things like Starmie and Gengar and whatnot.
Is there a real need for something as useless as Shockproof? Motor Drive does the job we're looking for, but better. It grants an Electric-immunity. It even boosts Speed which you can then pass on to Togekiss and attempt a sweep.
OH WAIT. GYARADOS?
Seriously what the fuck. You have a Gyarados, who STILL FAILS TO ROTOM, GENGAR, STARMIE AND ZAPDOS.
Guess what? You've now wasted a Team slot attempting to get CAP11 a free speed boost. Since Gyarados is not breaking the walls that can stop CAP11, nor it CAP11 aiding Gyarados' sweep as effectively since you're not killing Cune or Swampert. Also guess what - we have base 105 SpA maximum. Good luck even TRYING to sweep whole teams without Togekiss' Nasty Plot Boost. You now have a really fast Pokemon that can't 2HKO jack shit. Want a medal?
Weakening Electric-type damage...
Would you rather switch into Jolteon, absorb its Charge Beam, nab a Speed Boost and Aura Sphere it's ass? Or would you rather switch in, take negligible damage, let it grab a +1 SpA Boost and outspeed and Thunderbolt your sorry carcass? Yeah I fuckin' thought so. Sub Charge Rotom-A; hey guess what, you lose if you aren't immune to Charge Beam. You're gonna get killed eventually and then it'll just pick you off.
At least with Motor Drive you can be immune, which gives you an easier time switching in, and ergo gives Togekiss a bigger Safety net for which it can play around in. And then, when you've killed enough stuff, you can Baton pass that Speed boost back to Togekiss and attempt more Flinchy Fun.
Reduce paralysis rate/speed drop
Now this is just plain stupid. Really? You're still getting paralyzed. You're still getting fucked up the ass one time out of three. You're STILL going to be slower than you are. Even with a -1Stage as opposed to a -6 Stage speed drop, you're still going to be Togekiss speed. And considering that neither of them are then particularly fast, and neither of them will have any paralysis support of their own, good luck trying to continue sweeping and put on offensive pressure. This is the stupidest option there is, since all you do is just trying to make the effect slightly better when it's still a pretty fucking big problem. It's like putting a sticking plaster on a broken ribcage. You aren't dealing with shit. I would actually rather take the paralysis full force and not use this ability since it at least allows for Quick Feet or Guts or some shit rather than be forced stuck at halfway with a useless ability.
There is NO need for Shockproof whatsoever - It serves zero purpose and it outclassed in every single way by Motor Drive and Volt Absorb. Motor Drive and Volt Absorb are far from Broken, and if anything, they fit what CAP11 needs SO MUCH MORE than your shitty half-way buffer.
You are literally trying to cover a panfire with an ice-cube. A fucking half-assed attempt that will only make it all worse, since it doesn't help at all, it will waste an Ability slot, and I guarantee, that even if Shockproof makes it, Trace or something else is going to be used a HELL OF A LOT MORE.
Why? Since Shockproof sucks, is useless and pales in comparison to any other ability we could have.
Good day and enjoy your cranial cancer.