Games Most similar to red/blue?

So my son has gotten into Pokemon and it kinda reignited wanting to play it. I only ever played red/blue back in the day.

I tried playing let's go Pikachu/evee on the switch but it just didn't jive with me and was too simple.

What's the games that are most similar or just best to play? I feel like I read that some ones are remakes? Like green/FireRed are remakes but better?

I prefer the top down I think. So what should I look for?

I'm mainly looking for the best titles that are top down and similar to the original red/blue as far as gameplay (and are available on emulators)