>>38170188I just downloaded the MindCrystal romhack today and play it on my DS right now. It adds some features like fairy type pokemon, rebalances some things and supposedly makes the game somewhat harder. Interesting changes include that it prohibits you from using items against other trainers, an custom item for pokemon evolution (so you don't have to trade) and an 60fps hack that makes combat somewhat faster.
What I like in HGSS is that it uses the Pokegear functions from Crystal edition, which is my favorite game feature wise. This and the artstyle and first gen Pokemon are the reason I play this before Black/White. The only thing I miss are
friends to play it with. 