This is episode 6: "It's Ruff in the Ring". Ruff has accidentally been booked for a boxing match, and needs help. So he sends Shreya to learn how to box, and Marc and Marco to make protective head gear.
This is Season 5 episode 8 "How Much Frosting Can 你 Bear?" Shreya, Emmie, Marc, and Marco are sent to make a wedding cake for Grandma's friends' humans. Also, Rubye and 松鸦, 杰伊, 杰伊 · make a bearproof picnic basket.
This is Season 5 episode 5 "Ruffman Manor is Haunted". Ruff receives an letter saying that he has inherited Ruffman Manor, but believes that there are ghosts haunting it. So he sends the FETCHers to investigate the house.
This is Season 5 episode 10 "Who Wants to Trade for Some Old Tracks". Ruff sends Emmie and Marco to learn about animal tracks, and sends Rubye and Shreya to learn how to trade things.