So I just saw this video from UnlistedLeaf where he opens up a CP5 booster box. He has opened all the packs in the beginning of the video so he can go through the packs faster. At one point there is a pack where there are 4 EX cards in it. Do you think it’s legit and this kind of error is possible? It could have been done on purpose as the packs were opened… I’ll put the video below, it will start from the part where he gets into that booster.
I think there’s a small chance.
I’ve experienced some weird errors before in packs in the past.
One example was when I bought straight out of the box Japanese E-Series 4 packs. One of the packs I noticed actually had an E5 common trainer in it. I kid you not I was tripping out. So since that’s happened to me I could see something like this happening
Yes, this has happened to several people. Kris of The Pokemon Evolutionaries also has a video of opening it, and it happened to several people on Twitter. Not a super common factory error but a well-documented one nonetheless!
Can confirm, I did get 4 EX from one pack in one of my boxes.
I wonder if its less of an error and more of a marketing ploy? Stories and videos like these are surely great advertisement. Interesting stuff. I have opened a lot of English packs though and have seen definite errors of many kinds. No code cards, two code cards, hell I even have a blank code card. No rare card, no reverse holo many things. Don’t think I’ve ever doubled up on ultra rares though.
I’ve seen packs on yt that were purely/partly rev holos in the u and c slots.
This actually happened to me, pretty cool
holy crap I wish I had’ve gotten that ;o;
Alright, thanks for the info guys 
That’s an awesome error to get. Interesting point from @gottaketchumall about marketing as that error seems to be surprisingly common in the end