Saiyuuki: Son Gokuu Monogatari(1926)

The monk Xuanzang goes on a journey to western India to get the Mahayana Buddhist scriptures. In the middle of the journey, Xuanzang helps Sun Wukong who was confined in a large rock by Guanyin for being too full of mischief. Sun Wukong, who becomes Xuanzang's pupil, punishes a pig monster who is attacking a girl. The pig becomes a new pupil disciple named Zhu Bajie. A kappa (water imp) is also renamed Sha Wujing and becomes a pupil. When Sun Wukong confines a monster in a large stone and throws the ball he obtained from it, a holy mountain topped with snow appears. It is the Ho-den hall pagoda where the Mahayana Buddhist scriptures are stored. When Xuanzang asks Tathagata Buddha to grant him the sacred scriptures, Nyorai-sama says the scriptures will be delivered by a dragon cart.

(Source: animation.filmarchives.jp)