If the player has no Pokémon that can use a field move that is required to continue the game, they may catch another Pokémon that can learn said field move.If the player gets a game over, they may start over from when they got their previous Gym Badge. Each Gym Badge may act as a checkpoint.Shiny Clause: Shiny Pokémon do not need to be released if they faint.The player may have a small number of 'second chances' or revives of fallen team members.If this many duplicate Pokémon are encountered in an area, the Species/Dupes Clause is no longer applied for that area and the player has to settle for the next Pokémon they encounter, regardless of its species. A limit may be set on how many times they can apply the Species/Dupes Clause in an area.This is to increase variety in a player's Pokémon collection. Species/Dupes Clause: The player may continue fighting Pokémon in a new area until a species is encountered that has not been caught yet, which then immediately counts as the first encounter.Likewise, in the games where the rival battle is immediately after obtaining the starter Pokémon, the 'any Pokémon that faint must be released' rule is often not enforced at that time. For example, encounters starting from the Poochyena R S OR AS/Zigzagoon E that the player has to save Professor Birch from, up to when the player has the ability to catch Pokémon, are not counted.
The core rules are not in effect until the player has gained their first Poké Balls and thus the ability to catch Pokémon.Online resources (walkthroughs, guides, etc.) may not be used.Quality-of-life features, such as Pokémon-Amie, the DexNav, or Super Training, may not be used.Any Pokémon obtained must be either given to the player or hatched from an Egg. What to do with Pokémon in a player's collection that surpass the level limit is up to the player. The player may not use Pokémon above a certain level limit based on the level of the next Gym Leader/Elite Four/Champion's highest leveled Pokémon.(Black 2 and White 2 only) The difficulty must be set to Challenge Mode, which increases the levels of opposing Trainers' Pokémon.The player may not evolve their captured Pokémon, but evolved Pokémon may still be caught.Poké Marts may not be used the only items that may be used are those found in the overworld or given to the player by NPCs.The number of Poké Balls able to be purchased per Poké Mart is limited to a certain number.The player is limited in their Pokémon Center visits to a certain number per town.Or, Pokémon Centers may not be used, meaning only Potions and items may be used for healing.Potions and status-healing items may not be used, so the player may only use Pokémon Centers for healing.
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The player must use the same number of Pokémon as the opponent uses during a Gym battle or rival battle.The player may only catch the first Pokémon after each Gym battle instead of in each area.A black out/white out is considered to be a 'game over,' even if there are usable Pokémon left in the PC, and the player must start over.Alternatively, use the Trainer ID modulo 3 for the same purposes.
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A common system is if the last digit of the player's Trainer ID number is 1-3, the player must choose the Grass-type starter if it is 4-6, the Fire-type starter if it is 7-9, the Water type starter if it is 0, free choice.
Many other rules exist other than those listed here challengers adjust their personal rules according to their own preferences. Though the above rules tend to stay consistent with all challengers, many optional variations and amendments to the rules have been created by players to further adjust difficulty.