>>14345592In addition to these:
Something similar to Sinnoh/Hoenn sound in HGSS that works for water.
More objects in Secret Bases.
More to explore postgame, like a route that has an island that changes between a few everyday. Similar to Mirage Island, but more islands and there would be always be an island there, just a different one every day.
More Safari Zone extensions. Hoenn had the best Safari Zone, it was a lot like Kanto's but the Pokemon weren't too hard to find or catch.
More secret base biomes, namely underwater secret bases. Also more to explore underwater. Evolution stones will be too easy to get in XY for me to hunt down shards like I had to do to evolve something in RSE, but I still like the concept.
Storyline more similar to Ruby and Sapphire (including Steven), but postgame more similar to Emerald + everything else listed.