What should I do to emulate Sonic 3 & Knuckles?

FishandChips

AKA Mario Wumpus!
I want to play Sonic 3 & Knuckles but my DS screen is just too small to see anything. I want to know what emulator I should use and where to get the rom.
 
I want to play Sonic 3 & Knuckles but my DS screen is just too small to see anything. I want to know what emulator I should use [...]
While not exactly "emulation" per se, I'd suggest Sonic 3 A.I.R. (Angel Island Revisited). It's a fan-made widescreen "port/remaster", featuring many enhancements both possible and impossible on the Sega Genesis/Mega Drive.

[...] I want to know [...] where to get the rom.
From Steam at https://store.steampowered.com/app/71162/Sonic_3__Knuckles/.
Unless you have the means of dumping a USA Genesis copy of Sonic 3 & Knuckles yourself, this is the easiest (if not only) legal way, and the one officially recommended for getting Sonic 3 A.I.R. to work.
 

LuxisLand

Probably dead.
You have three choices.

1. Download/Buy Sonic 3&K Rom and play Sonic 3 A.I.R
2. Download "KegaFusion" emulator, download/buy Sonic3&K Rom and play it from there.
3. give up

No one cares about third one, so... two choices.
 

I'll Begin

🐑✨
I want to know […] where to get the rom.

Just so you know, this is technically piracy and against the Forum Rules. That's why nobody's giving you a straight answer. ROM websites are unfortunately something you'll have to find for yourself.

As for the emulator, Kega Fusion is a good one that runs fast on most machines and definitely runs Sonic perfectly fine. I've also rather warmed up to RetroArch (not an emulator but an emulation frontend) for being able to customise the visual experience to my liking, but it's definitely not as user friendly as it wishes it was.

I do recommend buying it on Steam though if that's an option for you. The built in emulator isn't perfect but totally usable (though there's a fanmade tool to convert it for use in other emulators, flashcarts, etc.), and additionally the excellent Sonic 3 A.I.R. will automatically pull the game data from your Steam copy.
 
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