What's the use of Pokemon Xiao Zhi seeing the stalks of Phoenix?

At first, it was to guide Xiao Zhi to travel to new areas. At first, it was because the newcomers in Xiao Zhi were too immature or something. Probably "Xiao Zhi doesn't know what he wants and what to do" will lead to the Phoenix. Later, when Xiao Zhi became mature and independent, she knew exactly what she wanted, so she didn't play Phoenix for a long time.