Gelnika The Gelnika is a type of vehicle from the " Compilation of Final Fantasy VII " . The Gelnika is a Shinra transport plane . Prior to being launched , the Gelnika can be seen at the airport in Junon . The Gelnika , known alternatively as the Sunken Gelnika , or Crashed Gelnika , is an optional location in " Final Fantasy VII " . It lies on the Bottom of the Sea to the south of Costa del Sol . The plane can only be accessed after the player has acquired the submarine from the Junon Underwater Reactor . The Gelnika holds some of the game ' s most difficult enemies , and also some of its best treasures . It can be visited at any time after obtaining the Shinra Sub in Part 2 or Part 3 , however , if it is visited after the events of Midgar at the end of Part 2 , the boss battle will not take place . Story . " Crisis Core - Final Fantasy VII - " . A Gelnika bombs Banora village after Zack Fair and Tseng discover its apple juice factory has been taken over by Genesis Rhapsodos , and that the village is deserted . Shinra orders the town destroyed to eliminate all evidence . " Final Fantasy VII " . Gelnika type planes are held in Junon . During Shinra ' s plan to ram the Huge Materia into Meteor , a Gelnika is used to transport the Huge Materia to Rocket Town . A Gelnika is also used to transport weapons and genetically engineered monsters designed to kill Sephiroth and is shot down by a Weapon , and crashes into the ocean . Even after sinking to the ocean floor , the plane ' s interior keeps from flooding , allowing for one to enter the sunken aircraft from the ocean . With the genetically engineered monsters now on the loose , the Gelnika still proves dangerous . After stealing a submarine , Cloud and his group enter the Gelnika and find Reno and Rude of the Turks who are there to recover the weapons and Materia . Cloud and his party defeat them and they retreat . Locations . Hallway . The entrance is entered from the Bottom of the Sea world map . A ladder descends into the Gelnika . At the top of the screen is a door leading to the Research Room . A save point sits next to this door . On the far - left is a door leading to a second Hallway . By this door is a chest containing the Heaven ' s Cloud weapon . There are no encounters fought in this room . Can be entered from the Entrance through a door at the bottom of the screen on the right hand side . At the top of the screen is a door that leads to the Cargo Room . If the player comes here before venturing to Midgar before the end of Part 2 , Reno and Rude can be found here and a boss battle will occur . Research Room . The Research Room can be entered from a door from the south which links it to the Entrance . Straight ahead by the left wall is a slope that leads up to a raised platform . At the end of this is a chest containing a Megalixir . Heading right from the entrance will lead to a box containing the Escort Guard armor . In the top - left corner of the lower - level of the room is the Conformer , the ultimate weapon for Yuffie ; and in the top - right corner is the Double Cut Materia . Though the Materia is pink in the field , the Double Cut Materia is a yellow Command Materia . If the chest containing the Megalixir is opened , the Double Cut Materia is hidden to the camera by the chest ' s lid . The Materia is on the lower floor whereas the chest is on the upper floor . Cargo Room . The Cargo Room is entered from the Hallway . Straight ahead is a chest containing a Megalixir . Straight ahead and the whole way along the right leads to a chest containing the Spirit Lance weapon . A staircase leads to a lower level . On the right - hand side , the Hades Materia can be found in - between some wreckage . In the bottom - right of the screen is a chest containing the Highwind manual to learn Cid ' s ultimate Limit Break . In the bottom - left of the screen is a chest containing the Outsider weapon . Quests . Stat maxing . Every enemy except the Turks ( boss ) in the sunken Gelnika can be morphed into stat plus items , allowing the player to max out every stat . Appropriately enough , Yuffie ' s ultimate weapon , the Conformer , which can morph enemies while dealing 100 % damage instead of 10 % , is also found on the sunken Gelnika . Level grinding . If the player is too weak to survive , obtaining Knights of the Round and pairing it with a Sneak Attack Materia may make the area more hospitable . As Sunken Gelnika is accessible before the W - Item Materia , which can be used for the W - Item duplication bug , it is advisable to buy Tents and stay near the door to the room with the save point , as no enemies are encountered there . Since Unknown yield a lot of gil , it is easy to buy a lot of Tents , but as sunken Gelnika has no shop , players have to leave to go to the nearby Corel to buy Tents if they run out . Etymology . Gelnika may be a mistranslation of " Guernica " .