The best rpg games like Pokemon Emerald are Pokemon FireRed and LeafGreen, Pokemon Legends: Arceus and Pokemon Platinum. Below are 9, each with the reason it is here — and, at the end, what filtering to rpg costs you.
Filtering to RPG means you want progression — a character to build or a party to grow — layered on top of whatever else you liked.
What you get: A reason to keep going after the novelty wears off. RPGs are the genre that reliably converts hours into feeling more capable.
What made Pokemon Emerald worth playing in the first place is covered on the full list. This page is the rpg part of that answer, and only the rpg part.
The same generation's engine applied to the original 151.
The biggest structural change the series has made, and the most fun.
The next generation's definitive version, and the better story.
The best non-Pokemon monster collector, with a genuinely clever type system.
Collecting plus a team-building puzzle with real strategy.
A faithful classic-style monster RPG with modern quality of life.
If the Battle Frontier was your favourite part, this is a thousand hours of it.
Straightforward, funny, and full of creatures to catch.
The Game Boy alternative, and the breeding system is deeper.
Immediacy. Almost every RPG asks for a slow first few hours, and the systems that make hour forty good are the same ones that make hour one a menu.
The full list is on games like Pokemon Emerald — 9 picks, no genre filter.
Pokemon FireRed and LeafGreen. The same generation's engine applied to the original 151.
No. Pokemon Emerald released on the Game Boy Advance, but a recommendation is only useful if you can play it, so the picks above span platforms and eras. What they share is the genre and the reason.
Whether the stats are the point. In an RPG the build decides what you can do; in an action game with stats the build only decides how fast you do it.
No. The picks below span turn-based, real-time and action RPGs, and each one says which it is.
By hand. Each pick was written for the full Pokemon Emerald list first, on what the game actually does, and this page is the part of that list that is rpg — never a genre tag lookup, which is how "best racing games like Super Mario 64" used to be a page on this site.
Or read the rpg guide for where to start in the genre generally.