You get a choice of like 18 different playable trainer skins and 80+ different starters
Then you learn that you can have all 6 of your party pokemon following you around on the overworld
Then you got the fact that you encounter pokemon via pokemon walking around in the grass, including visibly distinct shinies.
Oh and it has the full 1000+whatever pokedex so every different route has 20 pokemon walking around so as someone trying a Nuzlocke I'm just standing there struggling to decide which one to take
Oh and also since it's a romhack so I'm playing it on my 3DS
GBA era romhackers are something else
That's the thing, you look at how Mario or zelda went from 2d to 3d in the N64 and you can see how they completely redesigned it to make an amazing game that pushed the platform.
And while not as big of a change you can see how they grew to make the new Mario or botw.
While gamefreak/Pokemon is like "what if you can swivel the camera around a little bit" or "okay maybe in one area you can see the Pokemon walking around". And it still lags like crazy.