The games introduce Raikou, Entei, and Suicune, some new types of legendary PokГ©mon that wander around Johto, changing locations frequently. Trainers will call for a rematch and others will call about rare PokГ©mon that can be caught in a certain area. A new item called the PokГ©gear was introduced, functioning as a watch, map, radio, and phone, allowing the player to call other characters who offer their phone number. More specialized PokГ© Balls were introduced, which make PokГ©mon catching easier in certain situations. Other held items can give boosts to the PokГ©mon during battle. A new type of item able to be held was the berry, which comes in varieties and can restore health or cure status effects. New items were added, with some designed to exploit a new mechanic: PokГ©mon being able to hold items. Certain events, including PokГ©mon appearances, are influenced by this feature. A time system was introduced using a real-time internal clock that keeps track of the current time and day of the week. While PokГ©mon Gold and Silver retain the basic mechanics of capturing, battling, and evolving introduced in PokГ©mon Red and Blue, new features were added. This system of accumulating experience points (EXP) and leveling up, characteristic and integral to all PokГ©mon video games, controls the physical properties of the PokГ©mon, such as the battle statistics acquired, and the moves learned. A major aspect of this is developing and raising the player's PokГ©mon by battling other PokГ©mon, which can be found in the wild or owned by other Trainers. There are two main goals within the games: following through the main storyline and defeating the Elite Four and PokГ©mon Master Lance to become the new Champion, and completing the PokГ©dex by capturing, evolving, and trading to obtain all 251 creatures. As the player randomly encounters one of these creatures, the field switches to a turn-based 'battle scene', where the PokГ©mon will fight. As the player explores this world, they will encounter different terrains, such as grassy fields, forests, caves, and seas in which different PokГ©mon species reside. Like previous installments, PokГ©mon Gold and Silver are played from a third-person, top-down perspective, with players directly navigating the protagonist around the fictional universe, interacting with objects and people. The games almost matched the sales of Red and Blue, and by 2010 had gone on to sell over 23 million units making them the best-selling games for the Game Boy Color and the third-best-selling for the Game Boy family of systems. They continued the enormous success of PokГ©mon Red and Blue as PokГ©mon began to form into a multi-billion dollar franchise. They are considered by some to be the best games in the entire series, as well as some of the most significant games of the fifth generation of video game consoles.

PokГ©mon Gold and Silver were critically acclaimed upon release. The Johto Saga of the PokГ©mon anime is based on the new region introduced in the games.

Both games are independent of each other but feature largely the same plot and, while both can be played separately, it is necessary to trade between these games and their predecessors in order to fully complete the games' PokГ©dex.

The games introduce 100 new species of PokГ©mon and follow the progress of the player character in their quest to master PokГ©mon battling. In 2009, on the 10th anniversary of Gold and Silver, remakes titled PokГ©mon HeartGold and SoulSilver were released for the Nintendo DS. PokГ©mon Crystal, an enhanced version, was released a year later in each region. They were released in Japan in 1999, Australia and North America in 2000, and Europe in 2001. They are the first installments in the second generation of the PokГ©mon video game series. PokГ©mon Gold Version and PokГ©mon Silver Version are 1999 role-playing video games developed by Game Freak and published by Nintendo for the Game Boy Color.

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