[Battle] [pokeemerald] Goofy stuff happening while trying to change Hidden Power

[Torterra18]

So, a while ago, I was trying to change Hidden Power to kinda work like Photon Geyser, in the way that it changes category depending on the user's higher offensive stat, I did by making HP use PG's battleScript, but the results are kinda goofy, here's how I tested it:

Before I explain how I tested it, I must say that I was doing it on an older version of pokeemerald expansion, what version it is, well, a version before pokeemerald expansion versions where a real thing, so, already clarified, let's begin:

I first went on the game location where dittos spawned, I brought a Blissey with only refresh so the dittos copy it, and a Swampert with HP Dark, I was using a calculator to test the results, because the results were kinda weird, I decided to change Swampert's HP type to Fighting to get more precise results, and I'll say it, the calc said that if it was special, it would 3HKO, but if it was physical, it would OHKO, ingame, the result was kinda a mix of both, it would 2HKO, I tested it with another move, and the result was accurate to the calculator, so Idk if it was a mistake of mine or if I was being stupid, so here it is a screenshot of my calcing if that may help: