http://vitalstats.gov.mb.ca/Query.phpThe marriage index can be seen here (and the records ordered).
Location was Ellice.
In 1901 in Ellice, Margaret is with her husband and young son and on the same page are a large family of "Falloon":
http://www.automatedgenealogy.com/census/View.jsp?id=72870Both Margaret and this family (headed by a James) are Irish Methodists, but the children in the other family are all born Manitoba and it looks as if they emigrated much earlier. In the 1891 census this family and the Pizzeys are still in the same area, and it doesn't look like Margaret was actually their daughter (
http://www.bac-lac.gc.ca/eng/census/1891/Pages/1891.aspx )
My suggestion would be that James Falloon who appears in the area associated with the Pizzeys is the uncle of your Margaret, and she was sent to live with him by the family in Ireland for whatever reason. Could be as simple as he wrote back to family in Ireland saying there was plenty of work in Canada and he was willing to take in some of his nieces/nephews to help them out.
This history book has some information on him:
manitobia.ca/resources/books/local_histories/101.pdf
If we are to believe this, he was born 1846, County of Tyrone, Ireland, son of Samuel and Mary (Rutherford) Falloon, one of seven children (four moved to New Zealand). If you were to get the marriage certificate we could match up the parental information on there with (hopefully) another child of Samuel and Mary Falloon in Ireland.