Gym Challenge
This one is pretty straightforward. The rarity table for Gym Challenge is as follows:
No sheets are known from photos. I was able to determine the C2 and C3 cards on the commons sheet, however unlike the commons sheets of Base Set 2 and Gym Heroes I was not able to completely reconstruct it, as it contains three repeated sequences: one of 5, one of 6 and one of 18 cards, each of which appears on the sheet twice. So there is more than one way to put the “pieces” together. Here is one possible reconstruction, with the three repeated segments underlined. The double dagger marks signify that it is not clear where the sheet begins and ends, and that the reconstruction is only one of multiple possibilities:
†† Giovanni’s Magikarp, Koga’s Tangela, Misty’s Psyduck, Blaine’s Rhyhorn, Sabrina’s Psyduck, Lt. Surge’s Rattata, Misty’s Seel, Giovanni’s Meowth, Blaine’s Vulpix, Misty’s Staryu, Brock’s Diglett, Koga’s Zubat, Giovanni’s Nidoran f, Erika’s Paras, Transparent Walls, Lt. Surge’s Voltorb, Giovanni’s Nidoran m, Brock’s Geodude, Fervor, Blaine’s Doduo, Sabrina’s Abra (Pound), Misty’s Horsea, Blaine’s Charmander, Koga’s Ekans, Koga’s Grimer, Sabrina’s Gastly (Lick), Erika’s Oddish, Blaine’s Growlithe, Sabrina’s Drowzee, Misty’s Magikarp, Misty’s Poliwag, Giovanni’s Machop, Koga’s Koffing, Sabrina’s Porygon, Lt. Surge’s Pikachu, Blaine’s Mankey, Blaine’s Ponyta, Koga’s Tangela, Erika’s Jigglypuff, Giovanni’s Magikarp, Koga’s Pidgey, Sabrina’s Abra (Psyscan), Sabrina’s Psyduck, Misty’s Seel, Blaine’s Rhyhorn, Koga’s Weedle, Misty’s Psyduck, Lt. Surge’s Rattata, Blaine’s Vulpix, Brock’s Diglett, Giovanni’s Meowth, Misty’s Staryu, Warp Point, Sabrina’s Gastly (Gaseous Form), Transparent Walls, Brock’s Geodude, Erika’s Paras, Giovanni’s Nidoran m, Giovanni’s Nidoran f, Lt. Surge’s Voltorb, Koga’s Zubat, Sabrina’s Abra (Pound), Koga’s Ekans, Misty’s Horsea, Blaine’s Doduo, Sabrina’s Drowzee, Erika’s Oddish, Koga’s Grimer, Misty’s Magikarp, Blaine’s Growlithe, Sabrina’s Gastly (Lick), Lt. Surge’s Pikachu, Koga’s Koffing, Misty’s Poliwag, Blaine’s Mankey, Sabrina’s Porygon, Giovanni’s Machop, Koga’s Pidgey, Erika’s Jigglypuff, Blaine’s Ponyta, Sabrina’s Abra (Psyscan), Giovanni’s Magikarp, Koga’s Tangela, Misty’s Psyduck, Blaine’s Rhyhorn, Sabrina’s Psyduck, Lt. Surge’s Rattata, Koga’s Weedle, Misty’s Seel, Warp Point, Giovanni’s Meowth, Blaine’s Vulpix, Sabrina’s Gastly (Gaseous Form), Misty’s Staryu, Brock’s Diglett, Koga’s Zubat, Giovanni’s Nidoran f, Erika’s Paras, Lt. Surge’s Voltorb, Brock’s Geodude, Blaine’s Charmander, Sabrina’s Abra (Pound), Fervor, Koga’s Ekans, Misty’s Horsea, Blaine’s Doduo, Sabrina’s Drowzee, Erika’s Oddish, Koga’s Grimer, Misty’s Magikarp, Blaine’s Growlithe, Sabrina’s Gastly (Lick), Lt. Surge’s Pikachu, Koga’s Koffing, Misty’s Poliwag, Blaine’s Mankey, Sabrina’s Porygon, Giovanni’s Machop, Koga’s Pidgey, Erika’s Jigglypuff, Blaine’s Ponyta ††
If you look at the individual rarities of the commons, you will notice a preference for Trainer cards and Pokémon with two different variants to be among the ones appearing fewer times on the sheet, just like in Gym Heroes. The C2 commons also generally appeared fewer times in my sample, pointing to the fact that the “reconstruction” is correct.
I did not investigate the uncommons and Basic Energies. I assume there are no artificial rarity differences.
For the holos and rares, the raw Youtube data from 11 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 data to say anything definitive about individual card rarities here, but I would not be surprised if all the R5 cards were Trainer cards.
The next discussed here will be Neo Genesis, with some surprising information!