Alternatively, use the Trainer ID modulo 3 for the same purposes. 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. Regardless of the optional rules being used, the run is considered a Nuzlocke Challenge as long as the core rules are still in place. 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.
