I use Agility on my Pidgeot and I need to if it goes up by 3.0x or 1.5x twice. Her speed is 218. So would it be 654 or 491.

Step 1: Choose a random logical number Step 2: Multiply by .5 Therefore, modifiers must be from step one or the other. Back on topic, maybe he got used to the ability boosts like Technician and the like

Well, I assumed most thing that increase an stat 1 stage, most of the time, increases by 1.5. So I assumed 2 stages would be 3.0 the original stat. I did not know it doubled it.

I believe the formula looks something like this: CurrentStat = OriginalStat * (1 + Stage * 0.5); Meaning the stat maxes out at 4x the original (6th Stage). 1.5x would be a 50% increase over the original stat. 3.0x would be a 200% increase over the original stat. That would be an awful big jump from stage 1 to 2.