Bosco Adventure(1986)

Bosco Adventure is an animated series following Princess Apricot, heir to the throne of Fountainland and guardian of the Fountain of Life—the magical source sustaining the entire Bosco World. When villains kidnap her to seize control, the kingdom faces catastrophe: if Apricot doesn't claim her throne before the next solar eclipse, the Fountain will dry up and life itself will wither. A spirited group of forest animals—Frog, Otter, and Tortoise—rally to her rescue, embarking on a hot air balloon journey across the Bosco World to restore their princess and save their home. Filled with wonder, heart, and danger, their adventure tests friendship and courage as they race against time to prevent darkness from consuming the land.