The Blazers hold a 3-2 lead in the best-of-seven first-round series. Game 6 will be played in Victoria on Monday. If a seventh game is needed, it would be played in Kamloops on Wednesday.
The Royals got 47 saves from goaltender Patrik Polivka, while Cote scored twice. Jamie Crooks and Logan Nelson, the latter into an empty net, also scored for Victoria.
Chase Souto and Colin Smith replied for Kamloops.
Kamloops goaltender Cole Cheveldave stopped 21 shots.