Post either trick or treat. Then next pony will respond and than say either trick or treat themselves. Also you can say it's you/any of your OCs giving the trick/treet or a canon character. Feel free to keep an inventory. Example: pony1: treat please! pony2: *I open the door and give you a chocolate chip cookie. I'll see what I get if I say trick pony3: *Pinkie opens the door and gives you super salty, salt flavored hard candy. I would like a treat please. So I will start, and will be cautious: I, Kioku, would like a treat!
You get: English to Latin dictionary. It's an edjamacational gift, dagnabit. this seems a bit like Vending Machine, but I won't complain.
Actually, trick-or-treating refers to the trick-or-treater tricking the homeowner if they fail to provide a treat.