UPDATED 9/22/20

Links 'n shit
Look here for links before asking the thread. This is for GF made games only. Check the Romhack link if you're looking for one of those. Let someone know if any of these links go down.

Gen 1:
Blue
https://vimm.net/vault/3453/
Red
https://vimm.net/vault/3454
Yellow
https://vimm.net/vault/4233

Gen 2:
Gold
https://vimm.net/vault/4231
Silver
https://vimm.net/vault/4232
Crystal
https://vimm.net/vault/4230

Gen 3:
Ruby
https://vimm.net/vault/5628
Sapphire
https://vimm.net/vault/5629
Firered
https://vimm.net/vault/5626
LeafGreen
https://vimm.net/vault/5627
Emerald
https://vimm.net/vault/5625

Gen 4:
Diamond
https://vimm.net/vault/19593
Pearl
https://vimm.net/vault/19595
Platinum
https://vimm.net/vault/19596
HeartGold
https://vimm.net/vault/19594
SoulSilver
https://vimm.net/vault/19598

If HG/SS are not patched, then heres a link to the patches.
http://www.mediafire.com/?74qgcvm4uv11qh7
password is dth

Gen 5:
Black
https://vimm.net/vault/23667
White
https://vimm.net/vault/23669
Black 2
https://vimm.net/vault/23668
White 2
https://vimm.net/vault/23670

Gen 6:
Unfortunately these links have download timers, but these are decrypted versions.
X
https://1fichier.com/?fqradjith4k9dkypqvvw
Y
https://1fichier.com/?ig6kn0v1uef2uib7mdrs
Omega Ruby
https://1fichier.com/?hx2o260mvuhul0c1fspc
Alpha Sapphire
https://1fichier.com/?68b3575poajqqiuitbiv

Gen 7:
Unfortunately these links have download timers, but these are decrypted versions.
https://1fichier.com/?x2z9wzoi7shghpf6100j
Moon
https://1fichier.com/?c9jnx8ht2byvt9f3783c
Ultra Sun
https://1fichier.com/?rmyob2sleemyzn28tgwr
Ultra Moon
https://1fichier.com/?4a9z14pjins148hottwe

If you are looking to randomize games from Gen 1 - 5, check here!
http://pokehacks.dabomstew.com/randomizer/
Instructions are on that site.