My sister managed to win about 10 small-medium sized ponies, 5 of which are of Rainbow Dash and gave to me. I won a couple myself. That's how I got all my MLP plushies. My sister is a master of claw machines. She knows when it is at full strength, best way to grab a plushie, when you should give up, when it is rigged, or even when it has poor grip. Shes won like 100 non-MLP plushies in total.
I find claw machines rigged, its clear my sister doesn't. I don't I even remember a time when my sister walked out of the arcade WITHOUT a plushie.