I've been stuck on this couple for a few months now, and cannot find any solid information on them at all other than the 1901 census, which is really difficult to read.
From the 1901 census, I know that he immigrated from France in 1883, which means he likely married Emilie Lafrance (Lafrance-561) around 1883-1884.
There's an Anna Bouvier living with Emilie's parents in the 1891 census, which I believe is their daughter. The census says she was born around 1885, but I have yet to find a record to confirm this.
As for René's death, I believe I have the record, and it's attached to his profile, but I've said the date is uncertain as I'm unsure if it's actually him or not.
Emilie remarried to Guillaume Dugas in 1923, and that's the last record I have of her. I can't find a solid death record for her, though I did find an Emilie Pinel who died September 1, 1925 in Roberval and lists a René Bouvier as her deceased spouse, although I am unsure why they would list René when she was married to Guillaume, which is why I hesitate to say it's her. There are two other records of an Emilie Lafrance dying in 1925 and 1926 in Montréal, but I cannot confirm those are her either.
I have included all the information I have on both René and Emilie on their profiles if anyone wants to take a look.