West Hull 6-82 North Wales Crusaders
The Crusaders ran in 15 tries to comfortably negotiate their Cup trip to West Hull.
Lewis Weever scored a hat trick with Rob Massam, Andrew Moulsdale, Stuart Reardon, and Jono Smith each registering a try brace.
Craig White, Andy Gorski and Tommy Johnson also went over while Johnson kicked 11 goals.
Thomas Radley touched down for West Hull's consolation try, Joshua Hart adding the goal.
South Wales Scorpions 22-52 Doncaster
Doncaster progressed to the Cup's fourth round at the Scorpions' expense.
The visitors' tries came from Shaun Leaf, Mike Emmett, Dennis Tuffour, Stewart Sanderson, Kyle Kesik, Lee Waterman and Brooke Broughton.
Sanderson added six goals.
Dave James went over twice for the Scorpions with Connor Farrer and Connor Farrell also crossing while Courtney Davies kicked three goals.