Yes as long as it's unlocked. Just buy a Koodo prepaid SIM, go online and activate it with a base plan and any boosters, and you're good to go. You can top up with a credit card or buying vouchers in stores beforehand.
Dennis & Jonathan are right. You certainly can use your own unlocked phone and activate a Prepaid SIM card. Don't forget that you will need to manually set up your data. This link should help: http://koo.do/setupdata.