While the first Balto movie took some liberties with the real events, Balto 2 introduces entirely new characters and storylines. The movie focuses on Balto's son, Kodi, and his journey to find his own place in the world and learn about his wolf heritage.
So, while Balto 2 is entertaining, it's important to remember that it's not a factual account of Balto's life or the events surrounding the 1925 Nome serum run.