POKÉMON STADIUM
https://www.models-resource.com/nintendo_64/pokemonstadium/
https://www.models-resource.com/nintendo_64/pokemonstadiumjpn/
https://www.models-resource.com/nintendo_64/pokemonstadium2/
[State-Mostly rigged, with a few unrigged models]
As of now, no public tools to get the models rigged are available, so your best bet is TMR, which is still being updated.
POKÉMON SNAP
https://www.models-resource.com/nintendo_64/pokemonsnap/
[State-Unrigged]
Seemingly less documentation than Stadium and even less interest.
HEY YOU, PIKACHU!
https://www.models-resource.com/nintendo_64/heyyoupikachu/
[State-Unrigged]
Same as Snap.
POKÉMON CHANNEL
https://www.models-resource.com/gamecube/pokemonchannel/
[State-Unrigged]
Seemingly no info, nothing. Reuses a lot of Stadium models.
POKÉMON COLOSSEUM
https://www.models-resource.com/gamecube/pokemoncolosseum/
[State-Unrigged]
Some research, but no tools as of now. Most, if not all gen 1 & 2 Pokémon are reused from Stadium.
POKÉMON XD: GALE OF DARKNESS
https://projectpokemon.org/home/forums/topic/39853-pokemon-xd-god-and-pokemon-colosseum-file-editing-tools/
https://www.models-resource.com/gamecube/pokemonxdgaleofdarkness/
[State-Unrigged]
Tool linked above seems to be onto something, but doesn't seem to be able to export models yet. Only two available models.
POKÉMON GENS 4-5
https://www.models-resource.com/ds_dsi/pokemondiamondpearl/
https://www.models-resource.com/ds_dsi/pokemonplatinum/
https://www.models-resource.com/ds_dsi/pokemonheartgoldsoulsilver/
https://www.models-resource.com/ds_dsi/pokemonblackwhite/
https://www.models-resource.com/ds_dsi/pokemonblack2white2/
[State-Rigged, with a few minor exceptions]
Mostly environment models, with a few decent title screen legendary models.
POKÉMON BATTLE REVOLUTION
https://www.models-resource.com/wii/pokemonbattlerevolution/
https://www.vg-resource.com/thread-22105.html
[State-Unrigged]
A handful of remade and new Pokémon models, some documentation and a script that can somewhat export models without rigging.
POKÉPARK WII
https://www.models-resource.com/wii/pokeparkwiipikachusadventure/
https://www.models-resource.com/wii/pokepark2wondersbeyond/
[State-Rigged]
All Pokémon models from the series can be found on TMR.
POKÉDEX 3D
https://drive.google.com/file/d/1kZAtdvmrtksr2q_hCcC5TSCDxRr3W3GH/view?usp=sharing
[State-Unavailable]
Seemingly no info on file formats, although I'm providing (seemingly) the Pokémon files for anyone wanting to figure it out.
POKÉMON RUMBLE
https://www.models-resource.com/wii/mypokemonranch/
https://www.models-resource.com/wii/pokemonrumble/
https://www.models-resource.com/3ds/pokemonrumbleworld/
https://drive.google.com/file/d/1ORK7wTexNhp1qMyiBic_Vr4h8JEa8yDX/view?usp=sharing
[State-Rigged (but does that really matter for these?)]
Besides some UV mapping abnormalities and the occasional texture change, models are reused throughout the series and you're better off getting the Rumble Rush zip as that has everything, with the exception of some Gen 7 Pokémon.
POKÉMON MYSTERY DUNGEON 3DS
https://drive.google.com/file/d/1U0TWck6jglZB_5K2HJIXXu_yy24vzQtn/view?usp=sharing [Gates to Infinity]
https://drive.google.com/file/d/1whkZ7L24ijWPeiv4uDQ1ow651Fh46ex6/view?usp=sharing [Super Mystery Dungeon]
[State-Rigged, yet unconverted]
For some reason these aren't uploaded yet, so I had to get the files myself a long while ago. Unconverted but Ohana3DS opens these perfectly fine.
POKKÉN TOURNAMENT
https://www.models-resource.com/wii_u/pokkentournament/
https://www.models-resource.com/nintendo_switch/pokkentournamentdx/
Raw models- https://mega.nz/#F!z4RnUIYL!6h79bXOo2iSFbSsWLRnNAA
NUD importer Maxscript- https://mega.nz/#!KpIy3SCB!shgeg-4UB-_lGq8FSIBnYo_7FTX0zVFRLWAyBI5Oeng
[State-Rigged]
No dumps of the DX models as far as I'm aware, but everything else is here, you'll just need 3DS Max.
DETECTIVE PIKACHU
https://www.dropbox.com/s/ixepkn482njjorh/Detective%20Pikachu%20Models.rar?dl=0
[State-Rigged, unconverted]
All BCH, you can open them with Ohana3DS.
SMASH BROS
https://www.models-resource.com/nintendo_64/supersmashbros/
https://www.models-resource.com/gamecube/ssbm/
https://www.models-resource.com/wii/supersmashbrosbrawl/
BrawlBox- https://github.com/libertyernie/brawltools/releases
https://www.models-resource.com/3ds/supersmashbrosfornintendo3ds/
https://www.models-resource.com/wii_u/supersmashbrosforwiiu/
SSB4U Raw models- https://mega.nz/#F!qk4RzLAK!p5q1WwsxCrrD2ghLB28nFw
Smash NUD importer Maxscript- https://mega.nz/#!C4ZERZab!De1o5Bp1pdSybrPBKfCql2MeF3hkH601RcctuQM3qrE
Texture BMS script- https://mega.nz/#!7shywSyT!bgTf29OCx1XBDdIfoE4xvlLIJJE5tBXSImJG2l4XoBs
DDS Fix BMS script- https://mega.nz/#!XxoQQYZQ!SpwTQk-ITOlEyCuDS9iPO4nWAYfIO0wu2ykk1R_CCis
https://www.models-resource.com/nintendo_switch/supersmashbrosultimate/
Ultimate Raw models- https://mega.nz/#F!AAwWzCjT!Zd5kKpuQcE647DSRtpFShw
NUMDLB Maxscript- https://mega.nz/#!TkI0BSrR!HqhzVyHl5KUWAPUpSa7djMPepHut-F96I06qMu3gbQw
NUTEXB to DDS BMS script- https://mega.nz/#!LlZDwCAR!_nK-D-dvuYpISdyqQYWhALxydxGrmEaSm0Wc3qAHby0
[State- 64 to Melee: Unrigged
Brawl to Ultimate: Rigged]
There's a handful of tutorials for the three latest games, but nothing much on the original or on Melee. Definitely a hassle to get the Smash 4 and Ultimate models working, but it's worth the effort.
CURRENT GAMES (XY to SWSH)
https://www.models-resource.com/3ds/pokemonxy/
https://www.models-resource.com/3ds/pokemonomegarubyalphasapphire/
https://www.models-resource.com/3ds/pokemonsunmoon/
https://www.models-resource.com/3ds/pokemonultrasunultramoon/
https://www.models-resource.com/nintendo_switch/pokemonletsgopikachueevee/
https://www.models-resource.com/nintendo_switch/pokemonswordshield/
Ohana3DS- https://mega.nz/#!n4oGyDRZ!YXfrM55yQQyQsNgxJceK7Ls6kNVuxjVg9x4mVq_7TaU
Raw Models- https://mega.nz/#F!Tx4ziKbL!Fy4-wIjBjHx9EVw59dZCFg
GFBDML Importer MAXscript- https://mega.nz/#!HlpFXYDY!G9WcLuZupaCwboW3HRMoUS89oN-NQAK2UskZs-9rJOs
Switch Toolbox (Alternate Importer/Exporter)- https://github.com/KillzXGaming/Switch-Toolbox/releases/download/EXPERIMENTAL_LATEST/Toolbox-Latest.zip
Zipped FBX Models- https://drive.google.com/drive/folders/1uiC3bRW6_lbD_IMOyHduwKGAE2C-DEq6?usp=sharing
Pokémon UV Map Tools (Mirror)- https://drive.google.com/file/d/1cZNU1vttxFME081env-j7JWmrGDC4j7f/view?usp=sharing
[State-Rigged]
You know, the ones they love to reuse and retexture. Most Gen 1-7 Pokémon are already available, and getting them on Ohana3DS is simple.
POKÉMON MASTERS
Model/Texture/Raw File Dump- https://mega.nz/#F!5Q8iga5Y!CcHEIULdiigckfDqahIpKQ
Blender 2.79 Importer- https://github.com/jugolm/PokemonMasters
Blender 2.8 Importer- https://github.com/MiniEmerald/PokemonMasters
Useful Subdiving tip- https://archive.nyafuu.org/vp/thread/39854742/#39885484
LMD Animation Importer- https://anonymousfiles.io/YUOYDxf0/
[State-Rigged]
So far you won't find many common format versions of these models, but they're simple enough to import and set up.
MISCELLANEOUS MOBILE GAMES
https://www.models-resource.com/mobile/dancingpokemonband/
https://www.models-resource.com/mobile/pokemonquest/
https://www.models-resource.com/mobile/pokemonwavehello/
https://www.models-resource.com/mobile/pokemonduel/
Duel Unity asset files- http://www.mediafire.com/file/uml1nooi5kwvtdx/Figures.zip/file
Asset Studio- https://ci.appveyor.com/project/Perfare/assetstudio/branch/master/artifacts
https://www.models-resource.com/mobile/pokemongo/
https://github.com/ZeChrales/PogoAssets
[State-Rigged]
Most of these use the Unity engine and thus are easy to crack down. Pokémon GO is in this section due to a lack of model ripping caused by the fact that assets are downloaded and opened in real-time, without being stored anywhere on the device.