I stole a snorlax pokemon card from someone at my high school
You're kidding right? Why would you steal a card like that?
No, I really took it. I replaced it with mine, so I wouldn't get in trouble.
Stealing is stealing no matter what type of item it is. It is not your property, and you are not entitled to have it yourself. You should have just asked if you could trade, that would be more polite and less controversial.
I guess you're right. I can't believe I got suspended from school for it.
I'm not surprised that you got suspended, but it sounds like you may have learned a lesson about stealing. Next time ask the person if they want to trade.