Yes, it is true, I have made a roll guide.
This is because we want more people that can do rolls, but I don't want to have to explain how every single time. There is also a test for you to become a roller. [It won't be too simple, don't worry.]
First you need to find out what pack they want. Lets say this one is a Team Rocket pack. First off I open my random number generator. Random.org is what works best, especially if you use the Integer Generator. Lets say we're using the IG (Integer Generator). First I change the generate # many to 1, and leave the numbers at 1 to 100. You press get numbers. This number is the rare/super rare roll. 1-75 means rare, 76-100 means super rare. Make sure you remember whether you rolled rare or super rare. Lets say I got a 82, which means super rare.
Now onto the actual rolling of the cards. I know I need to roll 4 common cards, but I don't know how many common cards there are in team rocket, that's where this thread comes in. On the second post there is a list of all avaliable packs and the amount there are of each rarity.
I need to roll 24. Here are my numbers;
19 11 14 22
Now I need to find them numbers on the second post and that will tell me which common cards the person who bought the pack would get. This is them;
Slowpoke, Machop, Meowth, Zubat
Now I repeat this for the uncommon and rare/super rare roll, but only 3 cards for uncommon and 1 for rare/super rare.
A note: Super rares are holo rares, and rares are non-holo rares.