Is it "wrong" to cheat in a single-player emulator? The purist would say yes. They would argue that you are tainting the historical record, that you aren't experiencing the game "as it was."
To understand why using Cheat Engine on Xemu is so fascinating—and often so difficult—you have to understand what Xemu actually is. cheat engine xemu
So, if you are searching for "Cheat Engine Xemu" tables, or trying to figure out why your scan isn't finding your grenade count, take a moment to appreciate the complexity of what you are doing. Is it "wrong" to cheat in a single-player emulator