From 1997 to “nowadays” (let’s see, I can’t find anything after 2016) this company, Kyodo, made some pokemon metal figures and sold them with gashapon.
Used sources:
pkmncollectors
pokemonfigure
manveri
asakura
pokevault
cafepokemon AG-SM by @rek88k
cafepokemon OG
Original Sets 1 to 10, 1997-2001
“the original 151 for instance came in not only more “natural” metal colors such as gunmetal, copper, and shiny gold,
but fun colors such as purple, green, and blue.”
OG1 1997
Figures: Arbok, Sandshrew, Golbat, Psyduck, Poliwhirl, Geodude, Golem, Gengar, Starmie, Porygon, Snorlax, Mew
OG2 (probably) 1997 to 1999
Figures: Charmeleon, Weedle, Kakuna, Pidgeot, Jigglypuff, Venonat, Venomoth, Meowth, Poliwag, Machoke, Graveler, Magnemite, Seel, Grimer, Cloyster, Electrode, Marowak, Koffing, Rhydon, Chansey, Staryu, Pinsir, Kabuto, Mewtwo.
OG3 (probably) 1997 to 1999
Figures: Charizard, Squirtle, Wartortle, Caterpie, Raticate, Ekans, Pikachu, Sandslash, Clefairy, Oddish, Mankey, Arcanine, Machop, Machamp, Shellder, Haunter, Onix, Voltorb, Lickitung, Goldeen, Jynx, Ditto, Aerodactyl, Dragonite.
OG4 (probably) 1997 to 1999
OG5 (probably) 1997 to 1999
OG6 (probably) 1997 to 1999
Figures: Charmander, Pikachu, Nidorina, Nidoran (M), Nidoking, Gloom, Dugtrio, Golduck, Primeape, Alakazam, Victreebel, Tentacruel, Slowpoke, Magneton, Farfetch’d, Dodrio, Exeggutor, Cubone, Tangela, Mr. Mime, Eevee, Jolteon, Omanyte, Omastar, Kabutops, Mew.
OG7 (probably) 1997 to 1999
Figures: Venusaur, Pidgey, Pikachu, Raichu, Nidoqueen, Nidorino, Vulpix, Vileplume, Paras, Kadabra, Bellsprout, Tentacool, Slowbro, Doduo, Exeggcute, Horsea, Magmar, Moltres, Dragonair, Togepi.
OG8 (probably) 1999 to 2001
Figures: Chikorita, Cyndaquil, Totodile, Sentret, Ledyba, Spinarak, Marill, Quagsire, Snubbull, Heracross, Donphan, Elekid.
OG9 (probably) 1999 to 2001 (No Pics):
Figures: Chikorita(?), Hoothoot, Pichu, Mareep, Bellossom, Sudowoodoo, Aipom, Sunkern, Murkrow (?), Slowking, Stantler, Blissey, Ledian (?), Poliwrath (?).
Some has a question mark cause the 2 sources used are in conflict with each other.
OG10 (probably) 1999 to 2001
Figures: Pikachu, Meganium, Typhlosion, Feraligatr, Ledian, Pichu, Cleffa, Igglybuff, Ursaring, Slugma, Mantine, Larvitar.
“Available colors (for the Johto Pokémon) are gold, silver, copper, brass, and pewter”
Advanced Generation 1 to 6, 2004-2005
AG1 2004 or 2005 (No Pics Yet)
Figures: Pikachu, Treecko, Torchic, Mudkip, Wingull, Skitty, Plusle, Minun, Wailmer, Latias, Latios, Jirachi
AG2 2004 or 2005 (No Pics Yet)
Figures: Grovyle, Combusken, Marshtomp, Seedot, Trapinch, Castform, Shuppet, Regirock, Regice, Registeel, Groudon, Kyogre
AG3 2004 or 2005 (No Pics Yet)
Figures: Sceptile, Blaziken, Swampert, Taillow, Ralts, Slakoth, Gulpin, Sharpedo, Lunatone, Solrock, Whiscash, Deoxys (unkown form)
AG4 2004 or 2005
Figures: Mightyena, Azurill, Nosepass, Manectric, Seviper, Feebas, Wynaut, Glalie, Relicanth, Luvdisc, Metagross, Rayquaza
^master set shared by @Quuador
AG5 2004 or 2005 (No Pics)
Figures: Psyduck, Machop, Horsea, Pichu, Marill, Wobbuffett, Lugia, Makuhita, Aron, Wailord
AG6 2004 or 2005 (No Pics Yet)
Figures: Bulbasaur, Charmander, Squirtle, Raichu, Pinsir, Heracross, Bonsly, Mime Jr., Lucario, Weavile
Diamond and Pearl 1 to 10, 2007-2009 (or 2010)
DP1, March 2007 (No Pics)
#025 Pikachu, #130 Gyarados, #387 Turtwig,
#390 Chimchar, #393 Piplup, #396 Starly, #446 Munchlax
DP2. October 2007 (No Pics)
#025 Pikachu, #143 Snorlax, #417 Pachirisu,
#406 Budew, #436 Bronzor, #443 Gible, #453 Croagunk
DP3, December 2007
#025 Pikachu, #133 Eevee, #173 Cleffa, #408 Cranidos,
#410 Shieldon, #427 Buneary, #440 Happiny, #491 Darkrai
DP4, April 2008
#025 Pikachu, #063 Abra, #308 Medicham, #394 Prinplup,
#418 Buizel, #433 Chingling, #459 Snover, #463 Lickilicky
DP5, July 2008
#013 Weedle, #014 Kakuna, #025 Pikachu, #391 Monferno
#401 Kricketot, #403 Shinx, #444 Gabite, #486 Regigigas
DP6. October 2008
#025 Pikachu, #412 Burmy (grass, sand, trash), #447 Riolu,
#455 Carnivine, #487 Giratina (origin), #492 Shaymin (land)
DP7, March 2009 (No Pics)
#025 Pikachu, #208 Steelix, #377 Regirock, #378 Regice
#379 Registeel, #480 Uxie, #481 Mesprit, #482 Azelf
“Up to DP 7, the available colors are gold, silver, dark gold, copper, and gunmetal gray.
From DP 8 on, the colors are gold, silver, brass, and gold-copper.”
“Starting with DP series 8, flat coins with a Pokémon molded into it (plates) were also added into the series.”
DP8, 2009 or 2010 (No Pics)
Figures: Pikachu, Piplup, Buizel, Magikarp, Geodude
Plates: Dialga, Palkia, Giratina (Altered Form)
DP9, 2009 or 2010 (No Pics)
Figures: Pikachu, Chikorita, Cyndaquil, Meowth, Togekiss
Plates: Ho-oh, Lugia, Arceus
DP10, 2009 or 2010 (No Pics)
Figures: Pichu, Totodile, Slowpoke, Spinarak, Dugtrio
Plates: Raikou, Entei, Suicune
Black and White Best Wishes! 1 to 6 (?), 2010-2013
BW1, December 2010
Figures: #025 Pikachu, #495 Snivy, #498 Tepig, #501 Oshawott, #570 Zorua
Plates: #571 Zoroark, #643 Reshiram, #644 Zekrom
BW2, July 2011
Figures: #499 Pignite, #517 Munna, #531 Audino, #587 Emolga, #610 Axew
Plates: #025 Pikachu, #552 Krokorok, #503 Samurott
Probably BW #1 & #2 were re-released in 2011.
Not sure about the date, sure about the double release.
BW3, October 2011
Figures: #494 Victini, #504 Patrat, #530 Excadrill, #572 Minccino, #618 Stunfisk
Plates: #641 Tornadus, #642 Thundurus, #645 Landorus
BW4, February 2012
Figures: #588 Karrablast, #594 Alomomola, #600 Klang, #613 Cubchoo, #622 Golett
Plates: #638 Cobalion, #639 Terrakion, #640 Virizion
“Kyoudo will re-release the following Pokemon Metal Collection BW 3 and 4 in the middle of June 2012.”
BW5, September 2012
Figures: Pikachu, Piplup, Croagunk, Scraggy, Cryogonal
Plates: Kyurem, Keldeo, Meloetta (Voice)
BW6, February 2013
Figures: Pikachu, Meloetta (Pirouette), Litwick, Eevee, Charizard
Plates: Iris’s Dragonite, Druddigon, Genesect
“Kyoudo will re-release the following Pokemon Metal Collection BW 5 and 6 in the beginning of July 2013.”
X and Y 1 to 4 (?), 2013-2015
XY #1 October 2013
Figures: Pikachu, Meowth, Chespin, Fennekin, Froakie
Plates: Sylveon, Xerneas, Yveltal
XY #2 (2013 or 2014)
Probably XY #1 & #2 were re-released on april 2014. Unfortunately I’m just speculating here, nothing solid to confirm.
XY #3 November, 2014
XY #4 (2014 or 2015)
Probably XY #3 & #4 were re-released in 2015. Still nothing sure.
X, Y & Z 1 to 2 (?), 2015-2016
XY & Z #1, December 2015
[ XY & Z #2, August 2016 ]
Sun and Moon 1 to- , 2016