Gym Heroes
At the time I first wrote this post, there were no sheets known to me from this set. Since then, images of the commons and uncommons sheet have appeared on the internet: Uncut Sheets
At the time, I was able to reconstruct the commons sheet, and while it was not possible to do the same for the uncommons sheet, by looking at the possible combinations of cards that can appear in packs I felt fairly confident as to which cards have U2 rarity, particularly as their choice didn’t seem random and they were also among the ones that appeared the fewest time in the videos I watched for analysis purposes. The results I obtained proved to be correct; you can check out the sheets at the link provided above. The next post of mine down below is a digression on how to reconstruct uncut sheets.
The rarity table for Gym Heroes is as follows:
If you look at the individual rarities of the uncommons and commons, you will see a clear preference for Pokémon with two different variants as well as Trainer cards to be among the rarer ones.
For the holos and rares, the raw Youtube data from 9 boxes was as follows (the dashed line showing where the transition from H6 to H5 and from R6 to R5 would occur):
There isn’t enough information to say anything certain about the individual rarities for the holos, rares and Basic Energy cards. While there aren’t any really clear trends for individual cards aside from the fact that (just like the uncommon Trainer cards associated with Team Rocket) the Rocket’s Pokémon were among those to appear less frequently in the sample, it is noteworthy that despite smaller sample size the variance is much lower than for the Base Set 2 holos and for the Base Set, Jungle and Fossil samples I showed in an earlier post. This probably is due to the sheet being organized more regularly, eliminating to a large degree duplicate rares and holos from booster boxes. There also don’t seem to be any artificial rarity differences.
For the Basic Energies, Lightning Energy was observed the most often (in a smaller sample), which happens to be the Energy which appeared the most times on the Base Set and Base Set 2 Basic Energy sheets. This may be just a coincidence. In any case, the Basic Energies have similar pull rates all in all, leading me to assume that, unlike in Base Set and Base Set 2, there are no artificial rarity differences.
Edit 23/04/20: corrected the reconstructed commons sheet, a piece had gone missing when copying from my Excel spreadsheet
Edit 23/04/25: corrected tables for raw data of holos and rares (The Rocket’s Trap was mistakenly included among the rares).
Edit 23/19/27: edited post now that images of commons and uncommons sheet have surfaced