Pokémon: The system says it is a modifier

Introduction: "System manager, are you familiar with this modifier system?" "I am a system manager, can I give you a fake system?" "Let me ask you, are you familiar with this system?" "Are you deliberately finding fault? What if I am not satisfied with the system, so I deleted it myself, is that okay?" "Oh... then can this system allow me to shop for 0 yuan? Can it pass through walls and teleport? It allows me to encounter strange color treasures in the wild Is it a dream? You can..." "Uh, you can't..." "Then what's the use of you!" (In short, this is a fan story with the theme of time travel, please lightly spray if you don't like it...)