2) Groudon/Kyogre & time/weather change! I think (if possible) it would be awsome if the game could auto set time to 0 if you bring out Groudon (much like when sleeping on a bed), and for Kyogre to bring rainfall when brought out. Or at least to have them as External Moves of those Pokemon, like Forage, Fly, etc?
3) Time change effects! Maybe it would be cool if there was an option (other than the Bed) that could set the game to nightime/daytime/dusk/dawn manually. Maybe as external moves? It would be very helpful for people to catch specific Pokemon that spawn only during the nighttime, dusk or dawn (daytime can be set anyway with a bed).
4) Special Ore detector! Much like the Itemfinder, it can be an item that would show the areas of the Special Ores (Ruby, Sapphire, Amethyst, Silicon, Crystal). Maybe 5 seperate items (one for each ore). It would be an awsome addition imo, and a life saver for me! xD
5) Swim Flippers! Much like the Running Boots, they will be giving you a speed boost inside the water. And I mean swimming speed not running speed inside the water like Depth Strider. (maybe to slow you down when walking on the land? )