>>28957808Star is just a straight up difficulty increase. alternate versions increase wild pokemon options a bit. gets a bit much though with stuff like Flannery's Volcanion or Sidney's Darkrai
Sinking doesn't get as insanely difficulty, but puts more work into balance. you can catch all the pokemon throughout the game, and there are some adjustments to pokemon, such as new stats, types, and/or moves.
Meme is a fusion of the above two, but last I checked it is outdated and uses an older version of Sinking that doesn't have as many changes.