I'm not really superstitious as such, and like most people I have a Pokeball catching system whereby I hold the Down button and press 'A' and 'B' alternately until I see the capture sparkles. If it's a Legendary or some other hard-to-capture Pokemon, I also close my eyes saying "Please oh please oh please oh for the love of all that is good and holy please..." until I capture it. I was trying to capture my Regi's in my Sapphire game and I couldn't for the life of me catch Regice. After using up 50 Ultraballs, 6 Pemierballs, 5 Pokeballs, 10 Repeatballs and 10 Timerballs (and repeatedly sending the thing asleep for all of them) I re-started, did my above catching system, and caught the thing on the third Ultraball. I re-started three more times. Again with all of them, I caught it within 5 Ultraballs. Am defineilty using that system when trying to catch all my legendaries in my Diamond game.
I also had a very strange thing happen to me. I was over house sitting a good friends' aunt's house, (she and my best friend there too), and I was in the room she wouldn't go near (she says she can hear and see ghosts and spirits, and see the reincarnations of a soul, and while I personally can't, I ain't begrudging her it), saying there was a little boy in my room crying for help. Whenever she walked past the room, she'd hiss like a cat at it. Once the air-con in my room stuffed up and I asked her to fix it, since it wasn't one I was familiar with it. The entire time she was in the room, she was saying "I can't hear you! Lalalalalalala..." and so forth. Anyway, she said that the house had apparently belonged to a quack doctor in the early 1900's and he had (judging by the amount of ghosts in the house) killed more patients than not, and now their ghosts were inhabiting the rooms.
One night, on the second-to-last night we were there, I went to bed and had a dream of the quack doctor trying to cut my hand and fingers off. I felt a sharp stabbing pain in my left index finger. Then in the dream, I saw the young boy she said was in my room, plus a few other ghosts holding down the doctor, while a young woman, who I assumed was his assistant bandaged up my finger.
When I woke up, the bandage was still there. And when I fell asleep, there had been none! I told my friend, and she said something about my soul being a 'new' soul, and had never been in this world before, hence I had a lot of untapped 'spiritual energy' and the ghosts were attracted to it. I never saw the ghosts again, and if it hadn't been for the bandage on my finger, I'dve never had believed it happened. I still have the scar, faded, but still there. So, while I personally don't believe in 'em as such, I know there are more things in this world than meets the eye.
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but i don't believe in the bad/good luck superstitions, but believe in karma, that's why good things happen and bad things happen. 
