I just saw it as a stun you back, stun still happens but it happens to both players
Example cyber comes in it stuns for 160 mirror guy reflects it back etc the mirror guy don’t get the turn like stu counter etc it also don’t protect the team from stun it only reflects it
There are lots of good ways it could work. The general concept of stunning them back when they stun you is quite fun I think. Whatever the design, I think it should be scaled to be similar-ish strength to stun converter, i.e. stronger than stun immunity but not as overpowered as stun counter can be.
I think we should stay away from stun all together 
Skill suck what if the opponent have the same monster it just be a loop
That would be hillarous
Converter and counter already punish stun/shockers enough.
Stun mirror is a decent idea, but reflecting stun could be punishable or pointless if they have stun converters/immunes, a stun counter or a stun absorber on the field as well.
A stun void passive would be better imo. No stun on either side would be fair.
This wouldn’t be a problem if players didn’t abuse shockers by placing them consecutively. Or even just using all 3. Well 4 now…
If stun mirror reflected tranquilising sleep as well then i’m all for it 
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There is more than 4 legendary shocking entrances right?
Nightlord
Cybereon
Celestrion
Edit: the other monsters I had in mind were 'stunning entrance" monsters. Not shocking entrance. I’ve come across heaps of them.