Here are all of the currently Available non-Alola dex Pokemon(and ones that can be seen, and thus can be automatically searched, on GTS)
004-Charmander -Breed Charizard (Japan Only)
005-Charmeleon -Evolve Charmander (Japan Only)
006-Charizard -Scan Pokemon Sun Moon Moncolle Mini Figure GET Vol.2 Charizard QR Code (Japan Only)
069-Bellsprout -Island Scan on Akala Island, Friday
070-Weepinbell -Evolve Bellsprout
071-Victreebel -Evolve Weepinbell
111-Rhyhorn -Island Scan on Ula'ula Island, Sunday
112-Rhydon -Evolve Rhyhorn
116-Horsea -Island Scan on Melemele Island, Wednesday
117-Seadra -Evolve Horsea
152-Chikorita -Island Scan on Melemele Island, Friday
153-Bayleef -Evolve Chikorita
154-Meganium -Evolve Bayleef
155-Cyndaquil -Island Scan on Melemele Island, Sunday
156-Quilava -Evolve Cyndaquil
157-Typhlosion -Evolve Quilava
158-Totodile -Island Scan on Melemele Island, Monday
159-Croconaw -Evolve Totodile
160-Feraligatr -Evolve Croconaw
175-Togepi -Breed Togekiss
176-Togetic -Evolve Togepi
183-Marill -Island Scan on Akala Island, Saturday
184-Azumarill -Evolve Marill
220-Swinub -Island Scan on Ula'ula Island, Monday
221-Piloswine -Evolve Swinub
230-Kingdra -Evolve Seadra
287-Slakoth -Breed Vigoroth
288-Vigoroth -Island Scan on Ula'ula Island, Friday
289-Slaking -Evolve Vigoroth
298-Azurill -Breed Marill w/Incense
315-Roselia -Island Scan on Ula'ula Island, Wednesday
363-Spheal -Island Scan on Akala Island, Monday
364-Sealeo -Evolve Spheal
365-Walrein -Evolve Sealeo
396-Starly -Breed Staravia
397-Staravia -Island Scan on Ula'ula Island, Thursday
398-Staraptor -Evolve Staravia
403-Shinx -Breed Luxio
404-Luxio -Island Scan on Akala Island, Tuesday
405-Luxray -Evolve Luxio
406-Budew -Breed Roselia w/Incense
407-Roserade -Evolve Roselia
464-Rhyperior -Evolve Rhydon
468-Togekiss -Island Scan on Poni Island, Tuesday
473-Mamoswine -Evolve Mamoswine
495-Snivy -Breed Serperior
496-Servine -Evolve Snivy
497-Serperior -Island Scan on Poni Island, Thursday
498-Tepig -Breed Emboar
499-Pignite -Evolve Tepig
500-Emboar -Island Scan on Poni Island, Saturday
501-Oshawott -Breed Samurott
502-Dewott -Evolve Oshawott
503-Samurott -Island Scan on Poni Island Friday
532-Timburr -Breed Conkeldurr
533-Gurdurr -Evolve Timburr
534-Conkeldurr -Island Scan on Poni Island, Monday
540-Sewaddle -Breed Leavanny
541-Swadloon -Evolve Sewaddle
442-Leavanny -Island Scan on Poni Island, Wednesday
543-Venipede -Island Scan on Akala Island, Thursday
544-Whirlipede -Evolve Venipede
545-Scolipede -Evolve Whirlipede
574-Gothita -Island Scan on Akala Island, Sunday
575-Gothorita -Evolve Gothita
576-Gothitelle -Evolve Gothorita
577-Solosis -Breed Duosion
578-Duosion -Island Scan on Ula'ula Island, Tuesday
579-Reuniclus -Evolve Duosion
599-Klink -Island Scan on Melemele Island, Thursday
600-Klang -Evolve Klink
601-Klinklang -Evolve Klang
602-Tynamo -Breed Eelektross
603-Eelektrik -Evolve Tynamo
604-Eelektross -Island Scan on Poni Island, Sunday
607-Litwick -Island Scan on Melemele Island, Saturday
608-Lampent -Evolve Litwick
609-Chandelure -Evolve Lampent
610-Axew -Island Scan on Ula'ula Island, Saturday
611-Fraxure -Evolve Axew
612-Haxorus -Evolve Fraxure
633-Deino -Island Scan on Melemele Island, Tuesday
634-Zweilous -Evolve Deino
635-Hydreigon -Evolve Zweilous
658-Greninja(Battle Bond/Ash-Greninja) -Recieve from Pokemon Sun and Moon Special Demo
679-Honedge -Island Scan on Akala Island, Wednesday
680-Doublade -Evolve Honedge
681-Aegislash -Evolve Doublade
Seen Only Pokemon:
003-Venusaur -Pokemon Trainer Red(Battle Tree Entrance)
006-Charizard -Pokemon Trainer Red(Battle Tree Entrance)
009-Blastoise -Pokemon Trainer Red(Battle Tree Entrance)
013-Weedle -Rising Star Elijah(Malie Garden after beating Guzma)
016-Pidgey -Lass Rika and Lass Emmy (Malie Garden after beating Guzma)
023-Ekans -Youngster Tyler and Veteran Don (Malie Garden after beating Guzma)
029-Nidoran F -Lass Rika and Lass Emmy (Malie Garden after beating Guzma)
The Charizard in question really is Japan only right now. The QR code only works with Japanese games, and the GTS and other online services currently don't allow it even though it is legally available. For those wondering the figures in question are all scannable to obtain the Pokemon in the games. Currently the only really notable figures are Charizard(the only non-Alola dex Pokemon in the figure series thusfar), and the three Alola starters, all four of which can be caught in Pokeballs other than the default Pokeball via this method, for those that care about that, so if you see Alola starters not in Pokeballs on the GTS there is a chance they are actually legit.