What is the dream act? If you mean to say that he's illegal in the US, it's very unlikely that he would get a temporary visa for Canada. Even though he wasn't responsible for being brought there as a kid, as soon as he's 18, he is the one who made the decision to stay.
He can immigrate though. Look for a way for him to apply for PR directly at
http://www.cic.gc.ca/english/immigrate/index.asp