In Generations I and II, save files of English and European versions are also compatible with each other. Save files of paired versions are compatible with either version. Interrupting the saving process in the Generation I and II games may result in permanent loss or corruption of data. Starting in Generation III, save file backups are stored, meaning that if the saving process is interrupted and the save file becomes corrupted, then the previous file will be loaded from the backup. The game will show an error message reporting the corrupted save data the next time they access the main menu. In the event that the saving process is interrupted, the save file risks corruption, effectively causing its data to be lost, thus forcing the player to start a new game. There's also no way to delete the saves in-game (but can be deleted in the console's settings). In Generation VIII by pressing the button ↑ + X + B combination in the title screen players can choose to load a backup save file. The combination was changed to ↑ + X + B in Generation VI, and the option to start a new game is not available in the main menu starting in Generation VI. The game will show a warning message notifying the player of this, and an error message will appear if the player attempts to save anyways. From Generation IV up to Generation VI, as a precaution against unwanted loss of data, any existing save file must be manually deleted by pressing the ↑ + SELECT + B button combination on the title screen before a new game's save data can be written. However, the new game cannot be saved without overwriting the existing file, which results in all prior progress to be lost. Prior to Generation VI, a new game can be started even if there is already a save file stored on the game's cartridge. Saving the game is required when using certain in-game features (see List of activities for more information). Beginning with Pokémon: Let's Go, Pikachu! and Let's Go, Eevee! save files are stored in the console's internal memory and not in the cartridge. The save file is stored in battery-powered SRAM in Generations I and II, and in flash memory from Generation III onward. Unlike the core series games, this is carried over to the localized versions as well.

In the video game Pokémon Trading Card Game and Pokémon Card GB2: Here Comes Team GR!, saving is presented as writing in the player's Diary. As a result, the save function is represented by a book icon in the core series Pokémon games. In the Japanese core series games, saving from the menu is presented as writing down the player's recent actions in a Pokémon Report (Japanese: ポケモンレポート), although it is referred to as saving when saving due to changing Boxes in the Generation I and II games.

3.1 Pokémon Colosseum and Pokémon XD: Gale of Darkness.

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