The senior team of the club won the Allan Cup men's championship in 1939 and 1947, and the junior team of 1949 won the Memorial Cup junior men's Canadian championship.
The Junior team reached the eastern Canadian championship five times, winning in 1941 and 1949, and finished runners-up in 1933, 1944 and 1945.
When the Royals advanced to the 1941 Memorial Cup semifinals, Quebec Amateur Hockey Association president Norman Dawe lobbied for games to be played at the Montreal Forum instead of all games in Toronto.
[4] The Canadian Amateur Hockey Association voted against his request due to budget constraints and travel costs.
The remainder of series was cancelled due to poor attendance and gate receipts.