Is there a list of all the trainer’s magazine volumes and the promos that come in them?
This is what you’re looking for Daelum?
bulbapedia.bulbagarden.net/wiki/T_Promotional_cards_(TCG)
Cards were released from Volumes 14 to 21. 3 cards per Volume
Kind of - it helps though 
Aren’t there earlier magazines that had promos as well?
EDIT: For the T promos, does each Magazine come with all 3 of its respective promos?
1 Like
Heres the total list of Cards
Snap Pikachu Pokémon Card Trainers Vol.1
Bilingual Exeggutor Pokémon Card Trainers Vol. 3
Murkow Pokémon Card Trainers Vol.4
Dark Energy Pokémon Card Trainers Vol.4
Steelix Pokémon Card Trainers Vol.5
Smeargle Pokémon Card Trainers Vol7
Unknown J Pokémon Card Trainers Vol.8
Misdreavus Pokémon Card Trainers Vol.9
Dark Ivysaur Pokémon Card Trainers Vol.10
GB Dark Venusaur Pokémon Card Trainers Vol.10
Scizor Pokémon Card Trainers Vol.12
Bill Pokémon Card Trainers Vol.13
Celebi Pokémon Card Trainers Vol.13
Flareon Pokémon Card Trainers Vol.14
Vaporeon Pokémon Card Trainers Vol.14
Jolteon Pokémon Card Trainers Vol.14
Slowpoke Pokémon Card Trainers Vol.15
Slowbro Pokémon Card Trainers Vol.15
Slowking Pokémon Card Trainers Vol.15
Bayleef Pokémon Card Trainers Vol.16
Quilava Pokémon Card Trainers Vol.16
Croconaw Pokémon Card Trainers Vol.16
Ivysaur Pokémon Card Trainers Vol.17
Charmeleon Pokémon Card Trainers Vol.17
Wartortle Pokémon Card Trainers Vol.17
Moltres Pokémon Card Trainers Vol.18
Articuno Pokémon Card Trainers Vol.18
Zapdos Pokémon Card Trainers Vol.18
Dratini Pokémon Card Trainers Vol.19
Dragonair Pokémon Card Trainers Vol.19
Dragonite Pokémon Card Trainers Vol.19
Larvitar Pokémon Card Trainers Vol.20
Pupitar Pokémon Card Trainers Vol.20
Tyranitar ex Pokémon Card Trainers Vol.20
Imakuni?'s Whismur Pokémon Card Trainers Vol.21
Imakuni?'s Loudred Pokémon Card Trainers Vol.21
Imakuni?'s Exploud ex Pokémon Card Trainers Vol.21
Hope that helps 
3 Likes
The Trainer’s Magazine card inserts were:
5/99 Vol #1 Snap Pikachu
10/99 Vol #3 Bilingual Exeggutor
12/99 Vol #4 Murkow & Dark Energy
3/00 Vol #5 Steelix
7/00 Vol #7 Smeargle
10/00 Vol #8 Unknown J
12/00 Vol #9 Misdreavus
03/01 Vol #10 GB Dark Venusaur & GB Dark Ivysaur
07/01 Vol #12 Scizor
11/01 Vol #13 Celebi & Bill
Volumes #2, #6 did not have insert cards…I think #11 might have had 3 postcards …