Today marks 25 years since the original release of Pokemon Gold and Silver in Japan, leading the Pokemon series to new heights thanks to improved gameplay, additional features, and a plethora of critters exclusive to the Johto region. Gen 2 games were arguably leaps and bounds an improvement over Pokemon Red and Blue as well as Pokemon Yellow, and that's mainly thanks to the addition of new elements that ended up defining the gameplay loop of the whole franchise. Among the biggest stars of the show were the new 100 Pokemon added to the roster, some of which were only available at certain times, as Pokemon Gold and Silver introduced a night and day cycle.