Kohei Uchimura is a six-time world champion gymnast, a four-time gold medalist at the Olympics, and, apparently, an aspiring Pokémon trainer. Playing Pokémon Go in different locales can be a great way to accrue a collection of new monsters, but it can also cost you severely. Uchimura reportedly played a bunch after he arrived in Brazil without and it cost him almost $5,000 in data overages.
Source: Kotaku – Japanese Gymnast Reportedly Racks Up ,000 Bill Playing Pokémon Go At The Olympics