GameCube Emulator:
https://dl-mirror.dolphin-emu.org/5.0/dolphin-x64-5.0.exe

N64 Emulator
https://www.pj64-emu.com/download/project64-latest

Retro Arch (Probably for the best):
https://www.retroarch.com/?page=platforms

GameCube Games
Mario Kart - Double Dash!! (USA)
https://drive.google.com/file/d/1ZSfXuQk-sjhfpzCOb_mEE0uo3mzer1CA/view

Super Smash Bros Melee
https://drive.google.com/open?id=1VbRDAgcJP3YhxfmblrxabkFkGffw1g5P


N64
Diddy Kong Racing
https://wowroms.com/en/roms/nintendo-64/download-diddy-kong-racing-usa/24395.html

Super Smash Bros
https://wowroms.com/en/roms/nintendo-64/super-smash-bros.-usa/24984.html