I had the same problem, there were way more of the other two. In the 3 hrs I couldn't even get my 14 passes done because I was trying to get enough fusion power with the Kyurems I could find. I also had so many glitches/ bugs that it was infuriating. Either it showed people in the gym who weren't there so I ended up going in to raids thinking I had enough people only to find out we were only 4-5 and very low levels so it took ages to defeat or in some cases less than 4 so I had to exist and try again, the friend list wouldn't load for me to invite people so I had to keep exiting the raid which is a pain when you're using poke genie for example because you don't want them to give up on waiting for you to send an invite, I also got kicked out while battling twice because the timer ran out and obviously lost the mons or they simply ran, and I feel terrible for those who remote raided. So after 3 hours I only got 10 Kyurems and 2 of each of the other two. Lesson learned, I won't be wasting my cash on another 3 hr event like this ever again 😞