Upon entering the Lab with Genesect in the party, a Scientist named
Dudley will appear and become surprised that the player has the
Pokémon of the canceled project that he was working on. He will
request a battle with the player, then hand over two Drives (depending
on game version) after being defeated.-Bulbapedia
This can only happen when you have a Genesect in your party,OK.
Hope this helps- Here are the items
Dubious Disc Inside, TM24 (Thunderbolt) Southwest of
Researcher Nathan, Shock Drive Show Genesect to
scientist inside, Burn Drive Show Genesect to scientist
inside, Douse Drive Show Genesect to scientist inside,
Chill Drive Show Genesect to scientist inside.