Wild Drives first appear as red shadows in the lower half of the Yabbashah Block. During this time, they will be subject to one of Elizabeth's requests for subjugation. They will drop Greasy Gears while the quest is active and three are needed to complete the request. They will later appear as normal enemies during the Full Moon Operation on August 6th and in the second half of the Yabbashah Block.
In The Answer, they will appear in the second and third section of Caina within the Abyss of Time.
Wild Drives appear in B5F and B6F of the Secret Laboratory within the Midnight Channel. They will buff themselves with Tarukaja before attacking. After being defeated, they may drop the Iron Gear materials. Selling 6 Iron Gears will unlock the Kakitsubata sword for the protagonist in the shop.
In Golden, they only appear in B5F. They may also drop Meteorite for trade at Shiroku Pub.