The Legend of Zelda: Skyward Sword HD - Nintendo Switch
Mario Kart DS - Nintendo DS (melonDS)
Super Mario All Stars - SNES (Switch Online)
Super Mario Kart - SNES (Switch Online)
I'm really enjoying Skyward Sword in HD. I'm glad I picked it up! Well worth the £37 investment.
I've also been playing through Mario 2 on All Stars, using save states so I can actually beat the game though.
I'm playing the OG version of Super Mario Kart on Switch online, there is the souped up special version with the 150CC mode unlocked, but I prefer earning my own trophies in Mario Kart games to be honest. It's also a game I don't really like using save states in, even if I don't win the race.
melonDS is a great Nintendo DS emulator. I've used it previously and decided to try it out again. It has it's own BIOS now too and it runs DS games brilliantly. I've got it to run Pokemon Heartgold as it's been years since I've own the game physically and the cost of it now has just gone beyond what any normal person can afford to pay at the moment. But I was giving Mario Kart DS a good cash and I'm using a PS4 controller for the emulator which feels great also! If you're after a decent DS emulator, I'd highly suggest melonDS as it's still getting updates and it's a newer emulator and it works fantastically in my opinion.