Question: Who developed the roller coaster for the largest theme park in Germany? 
Context: Euro-Mir is a spinning roller coaster located at Europa-Park in Rust, Germany.  Unlike most spinning coasters, however, the cars do not spin freely, but are rotated by motors at set points during the ride.  It was designed by Franz Mack and opened in 1997. Roller coaster phobia is a colloquial and slang term describing an individual's fear of roller coasters.  While roller coasters are the most popular theme park attraction, certain people feel nauseated, afraid, dizzy, or unsafe when riding roller coasters.  In the majority of cases, this fear is related to acrophobia, claustrophobia, or a traumatic event.  Roller coaster phobia can be overcome relatively easily, the best cure being going on the tallest/fastest roller coaster before riding roller coasters of a lesser magnitude.  Roller coaster phobia has been linked to previously experiencing an accident, vertigo, and fear of heights.  In rare cases, riders may be afraid of roller coasters due to a painful ride, tight restraints, being thrown around in the restraints, and excessive g-forces on the body of the rider. A wooden roller coaster is most often classified as a roller coaster with running rails made of flattened steel strips mounted on laminated wooden track.  Occasionally, the support structure may be made out of a steel lattice or truss, but the ride remains classified as a wooden roller coaster due to the track design.  Because of the limits of wood, wooden roller coasters, in general, do not have inversions (when the coaster goes upside down), steep drops, or extremely banked turns (overbanked turns).  However, there are exceptions; the defunct Son of Beast at Kings Island had a 214 ft drop and originally had a 90 ft loop until the end of the 2006 season, although the loop had steel supports.  Other special cases are Hades 360 at Mount Olympus Water and Theme Park in Wisconsin Dells, Wisconsin.  The coaster features a double-track tunnel, a corkscrew, and a 90-degree banked turn.  There is also The Voyage at Holiday World (an example of a wooden roller coaster with a steel structure for supports) featuring three separate 90-degree banked turns.  Ravine Flyer II at Waldameer Park has a 90-degree banked turn, T Express at Everland in South Korea with a 77-degree drop, and Outlaw Run at Silver Dollar City which has 3 inversions and 120-degree overbanked turn. White Cyclone (ホワイトサイクロン , Howaito Saikuron ) is a wooden roller coaster at Nagashima Spa Land in Mie Prefecture, Japan.  At 1700 m in length, White Cyclone is the third longest wooden roller coaster in the world, and is the longest wooden roller coaster outside of the United States.  Despite its length, White Cyclone is still considerably shorter than the 2479 m Steel Dragon 2000, the world's longest steel roller coaster, which is also at Nagashima Spa Land.  In addition to being the third longest wooden roller coaster, White Cyclone is the seventh tallest wooden roller coaster in the world and the fourth tallest wooden roller coaster outside the United States.  A single ride on the White Cyclone costs ¥1,000 (approximately $9 USD), and the ride is restricted to those individuals above 1.3 m in height; and those individuals under 54 years of age. Theme Park World, also known as Theme Park 2, and in North America as Sim Theme Park, is a 1999 construction and management simulation game developed by Bullfrog Productions and released by Electronic Arts.  The direct sequel to "Theme Park" ("Theme Hospital" and "Theme Aquarium" are thematic sequels), the player constructs and manages an amusement park with the aim of making profit and keeping visitors happy.  Initially developed for Windows, it was ported to PlayStation and PlayStation 2 (whose version was titled Theme Park Roller Coaster in North America), as well for Macintosh computers.  The Mac version was published by Feral Interactive. Kings Island is a 364 acre theme park located in Mason, Ohio, 24 mi northeast of Cincinnati.  Since the opening of the amusement park in 1972, at least one attraction has been added every year except 1978, 1980, 1983, and 2008.  The park is known to have attractions such as Flight of Fear which was the world's first linear induction motor launched roller coaster, and The Beast which has held the record for the world's longest wooden roller coaster since its opening in 1979.  Also, The Beast continues to be ranked as one of the best wooden roller coasters in the world by industry polls.  Kings Island's newest attraction is Mystic Timbers, a wooden roller coaster manufactured by Great Coasters International.  With this addition, Kings Island claimed the record for most wooden roller coaster track of any amusement park in the world, and tied the record for most wooden roller coasters, with five. Intimidator is a steel roller coaster built by Bolliger & Mabillard at Carowinds.  The roller coaster is located in the Celebration Plaza section of the park on the former site of the Wild Thornberry's River Adventure log flume ride.  Intimidator is the thirteenth roller coaster installed at Carowinds and is located near the entrance of the theme park.  It is currently one of the tallest, fastest and longest roller coasters in the Southeast with a 232 ft lift hill, a top speed of 75 mph and a track length of 5316 ft .  It was announced on August 26, 2009 and opened March 27, 2010.  The roller coaster's name comes from the nickname of NASCAR driver Dale Earnhardt. Fujiyama is a steel roller coaster at Fuji-Q Highland, Fujiyoshida, Yamanashi, Japan.  When Fujiyama opened in 1996 it was the world's tallest roller coaster at 259 ft , and had the largest drop in the world at 230 ft .  Fujiyama was also the world's fastest roller coaster for a year of its operation, succeeded by Tower of Terror at Dreamworld theme park in Queensland, Australia in 1997.  Despite being the world's fastest roller coaster in operation for a year, Fujiyama set no world records for roller coaster speed.  Steel Phantom at Kennywood set the world record for speed before engineers added additional brakes to slow the ride down because of safety and rider comfort concerns. Europa-Park is a theme park and the largest in Germany, and the second most popular theme park resort in Europe, following Disneyland Paris. Robb Alvey (born Robert Lee) is a roller coaster reviewer, known roller coaster enthusiast, and video game producer for various companies, including Gray Matter Interactive and WayForward Technologies.  Raised in southern California, Alvey has been on over 1400 coasters all across the world and has documented his travels and those of others on his roller coaster website "Themeparkreview.com".  He and his wife Elissa have been featured on theme park documentaries for Discovery Channel, Travel Channel, TLC, and have done television commercials and promotional interviews for theme parks and rides manufacturers.  They have also been interviewed by major publications such as "The Wall Street Journal", "The New York Times", and many theme park industry periodicals.
Answer: Franz Mack