He appears to be either an overweight or simply burly and muscular dog and therefore he is most likely an Alaskan Malamute. And more laid back of the trio, usually serving as the blunt of pranks yet voice of quiet reason and complaints. At the race, he has a weakness to the level of a claw, which often causes slowdowns.
Balto III: Wings of Change
Ralph would be seen delivering mail to the various places in Nome, after they deliver all the mail but when they deleieved the mail, the team starts to picker at each other then Dusty stops her team from Pickering at each other and states is the snow that were slowing them down. When he hears her team's job were gonna be taken away, he tries to find any answers about what's happening to his job now. When Dispy tells them that his team they're gonna race Duke everyome were trying ti think of someone to help then Dusty was at the rally for Balto to lead the team in chance to beat Duke, and later runs with the team who beat the Duke's bush plane, they all celebrate about keeping their jobs and thanks Balto.
When Balto steps forward with his concern for Duke's safety, Ralph, like the others, is entirely against the idea of helping the "enemy." Kodi then later wants to go and help his father, but Ralph was against the idea. After Kodi leaves, Dusty follows him to the door, looking shocked when he left. With the rest of the team, Ralph comes to the rescue and saves Balto and Duke from falling off a cliff and helps pull Duke back to Nome.
(If certain characters aren't here, that means that they've not had any thoughts about them nor interacted with them. Feel free to summarize their perspective. (Fanfictions NOT included))
When they were in a struggle to find someone to help them beat Duke, Dusty right-away thought about Kodi's dad (Balto) an everyone agrees with her due to his Kodi's dad's sled dog experience and his past events. After the race, Ralph and everyone thanks him for saving their jobs but when Balto asked them to help Duke, they all reject. In the end, they would help him save him.
They are Ralph's friends and they all work together as partners and they all respect each other and they care very much about their jobs as delivering mail. They would be angry that Duke is gonna take their jobs away but they would want Balto's help as he was a sled dog once. After they participate in the race, they would end up winning but Balto was worried that something happened to Dukes and wanted to help him but much later they would have a discussing about Balto trying to save Dukes but all of them would disagree about it and much later, they would get angry at Kodi for joining his father's side but after they have a conflict, Kodi disbands from the group but they would help him save Duke along with his dad.
Ralph had hatred for Duke for trying to take his job away, he'll participate in the race to win so he can keep his job but after they win the race he celebrates and thanks his Kodi's father (Balto) but Balto worried that he might be hurt but Ralph didn't want anything to do with him as he wants his job forever but later his Kodi's reason and disband convinces him why just caring about his job is wrong instead of caring someone's life. Later, he will help his Kodi's dad to save Duke.