Trading from LeafGreen to ruby

Trading Pokémon from LeafGreen to Ruby is possible using a link cable or wireless adapter. In LeafGreen, access the Wireless Club in the Pokémon Center and set up a connection. In Ruby, use the Wireless Adapter to connect. Both players need the Pokédex in National Mode. Enter the Union Room or Wireless Club to initiate the trade. Ensure the Pokémon being traded is not holding an item incompatible with the receiving game. Confirm the trade when prompted. Save the game after completing the trade.