Yoshi is one of the supporting characters of Dolittle.
He is a white polar bear and wears ski hat (chullo) which given by Dr. Dolittle.
Unlike real polar bear, Yoshi hates the cold. The gentle giant likes nothing better than finding a bit of sun or spot by the fire to help his poor circulation. He is a happy-go-lucky.
Dr. John Dolittle and his wife, Lily keep rescues all kind animals.
Years later, Tommy Stubbins accidentally shoots and wounds a squirrel named Kevin, and is guided to Dolittle for help by Polynesia.
After being persuaded by Polynesia that he has to start trying to reconnect with other human beings, Dolittle finally decides to go. Upon reaching her, he finds that the Queen has been poisoned by a type of nightshade that was added to her tea. To be cured, she must eat a fruit from a far away land. Dolittle, Tommy, (who Polynesia, Betsy the giraffe and Tutu the fox help escape from his home) and Dolittle's crew of animals, consisting of Polynesia, Kevin, Chee-Chee the gorilla, Yoshi the polar bear, Plimpton the ostrich and Dab-Dab the duck put to sail, hoping to find the cure while trying to escape Dolittle's lifelong rival, Dr. Blair Müdfly. Dolittle leaves his dog, Jip, and a walking stick insect behind to guard the Queen while he's traveling. Along the way, Dolittle's boat is attacked by Müdfly, but they manage to escape by attaching a harness to a humpback whale that pulls the boat to safety.
They continue to the island where Lily was born. While attempting to steal Lily's journal which details the way to the fruit tree, Dolittle is captured by King Rassouli, his former father-in-law, and is locked in a cage with Barry, a hot-tempered tiger only looking for his mother's approval. Just when it seems Dolittle is to be killed, Chee-Chee arrives and incapacitates Barry. Dolittle and Stubbins escape only to be captured by Müdfly and have their ship destroyed. After seeing a crest-fallen Dolittle, Rassouli loans him a boat to honour his daughter.
Trailing Müdfly, Dolittle and company arrive at the cure tree's island, where they meet Ginko-Who-Soars, a dragon. Ginko begins attacking before she collapses due to internal pain. Dolittle figures out what is hurting the dragon and proceeds to remove armour and bagpipes (from previously eaten trespassers) from her behind. Relieved and thankful, Ginko shows Dolittle the tree with the cure, and Dolittle's entourage returns just in time to heal the queen. Dolittle’s walking stick insect reveals that Lord Thomas Badgley, one of the Queen's chairmen, poisoned her in order to take the crown for himself; the queen has him arrested for treason.
Dolittle re-opens the doors to his sanctuary, now including Stubbins as his official apprentice.