These are fan-made projects that recreate the Sinnoh region story and mechanics within a GBA engine (usually based on Pokémon FireRed Pokémon Sharp Diamond and Smooth Pearl
These fan projects attempt to recreate the Sinnoh region using Gen 3 (FireRed/Emerald) engines, often adding "extra quality" features like updated sprites and modern mechanics. Pokémon Sharp Diamond & Smooth Pearl These are fan-made projects that recreate the Sinnoh