i don't think so since sapphire is a game-boy version and diamond is nintedo ds version but since sapphire is a game-boy version you can migrate Pokemon from there.
No, you can't. You have to trade it from Ruby, Sapphire, or Emerald via palpark.
trade from them
You can't.
No, Pokémon Red cannot trade with Pokémon Sapphire. Pokémon Sapphire can only trade with Pokémon Ruby, Pokémon Sapphire, Pokémon Fire Red, Pokémon Leaf Green, Pokémon Emerald, Pokémon Colosseum and Pokémon XD. Sapphire can migrate its Pokémon into Diamond/Pearl/Platinum.
only when you get the national dex on Sapphire version
You can 'MIGRATE' Pokemon but, I don't think that you can trade them because the sapphire version is for the GBA and Pokemon Soul Silver is for the NDS.
You can't trade pokémon from Blue to Sapphire.
By trade.
You can't get the Regi's in Pokemon Diamond And Pearl. You have to trade from Pokemon Ruby, Sapphire, and Emerald.
Can't be found, migrate from a GBA pack version of Pokemon or trade from diamond or pearl version.
You must trade from LeafGreen version.
no but you can trade to firered and leafgreen for one