Inspired by "The Gamer" manhwa, many fics introduce a literal RPG system into the world:
"Konoha Training Cheat Code" appears to be a fan-created concept tied to Naruto fandom: the idea of a shortcut, exploit, or in-universe mechanic that allows characters in Konoha (the Hidden Leaf Village) to rapidly boost strength, skills, or abilities beyond normal limits. It’s most commonly seen in fanfiction, roleplay, forums, and game mods where creators introduce mechanics like hidden techniques, game-like XP exploits, forbidden jutsu, or special NPC trainers labeled as a “cheat code.” konoha training cheat code