Why? Political correctness taken to extreme lengths.
Hell, keep in mind that the Mandarin was even in the 90s animated series.
I don't know, was the cartoon being racist by using this name? You tell me.
A Mandarin was a bureaucrat in imperial China. The term originates from the Portuguese word mandarim, meaning "minister" or "counselor", and from the older Sanskrit word mandari (commander) used to translate the Chinese word guan (官). An alternative theory is that the term comes from the Chinese phrase "Mandaren" (满大人), meaning a "Manchu official". The term is also used to refer to the northern spoken variety of Chinese because it was the language used among officials during the Ming and Qing dynasties.
In the West, the term "Mandarin" is associated with the concept of the scholar-official, who immersed himself in poetry, literature, and Confucian learning in addition to performing civil service duties.
For around 1300 years from 605 to 1905, Mandarins were selected by merit through the extremely rigorous imperial examination.
China has had civil servants since at least the Zhou Dynasty. However most high ranking positions were filled by relatives of the sovereign and the nobility. It was not until the Tang Dynasty when the final form of the mandarin was completed with the replacement of the nine-rank system. The mandarins were the founders and core of the Chinese gentry. The mandarins were replaced with a modern civil service after the fall of the Qing Dynasty.
The wardrobe of a mandarin during the Qing Dynasty involved Manchu official headwear and a mandarin square. The office and residence of a mandarin was a yamen.
In modern English, "Mandarin" is also used to refer to any civil servant, often in a satirical context.