Absolutely ethical. Yuri's Revenge has missions where the AI starts with 10x your units (e.g., "Brain Dead," "Clockwork"). A trainer is a tool to bypass poor mission design or to simply enjoy a "god mode" sandbox.
Most trainers for the 1.001 version—the first and only official patch released for the expansion—focus on breaking the game's economic and timing constraints. Standard features typically include: Infinite Resources: red alert 2 yuris revenge trainer 1001 54
: This patch is the standard version included in major compilations like The First Decade and The Ultimate Collection . Absolutely ethical
: Allows buildings and units to appear instantly upon clicking, though this can sometimes "skip" units if multiple are queued too quickly . Most trainers for the 1
: Instead of having just one heroic Yuri Prime , a commander could use a trainer to bypass build limits, creating an army of psychic clones that could mind-control an entire Soviet base instantly.