Of Balto and Jenna's brown-and-white and red-and-white pups, three names are known for sure: Kodi, Dingo, and Saba. The two unnamed pups, the subjects of many "Balto" fan-fictions, have had names such as Kiona, Taktovik, Wolfe, Stadka, Anchorage, and Tydye.
It's possible that this film started as a Theatrical Film, but was changed into releasing Straight to Video for Unknown Reasons, which would explain why the dialogue of some Cast Members like Mary Kay Bergman (who passed away before the film's release) would've recorded their dialogue prior to the End of 1999.
Muru's name is Latin. It could come from "mus", meaning 'mouse.' Or, more probably, it derives from "murus", which means 'wall.' This is where we get the word 'mural.' Most likely, it comes from "murus" because Muru himself turns out to be a cave painting, and he is part of a huge mural on the cave wall.
The voice of Boris in this film ('Charles Fleicher') previously appeared alongside the voice of Boris in the first film ('Bob Hoskins') in the Live Action/Tradfitionally Animated Disney film Who Framed Roger Rabbit (1988) 14 years prior as the Main Characters.