For the uninitiated, a "trainer" is a third-party software program used to modify a game's memory while it is running. Unlike mods, which alter the game files permanently, trainers run in the background and allow players to toggle specific cheats on and off in real-time.

Most trainers for RE6 follow this specific execution order to prevent crashes:

: It is highly recommended to backup save data before use, as frequent modifications can potentially corrupt game files. Usage Limitations & Risks

: Alt-tab from the game to the trainer window to toggle desired features. Important Considerations Resident Evil 6 Ultimate Trainer - Speech Fix

The (most famously developed by modder wilsonso and his collaborators) is not a single, simple script. It is a sophisticated, multi-tabbed control panel that allows players to manipulate virtually every aspect of the game. While the vanilla game offers some "Infinite Ammo" unlocks via skill points, the trainer goes far beyond that.