In "Mighty Morphin Power Rangers: Once and Always," Rita Repulsa presents challenges for Minh to morph into the Yellow Ranger as part of her larger plan to defeat the Power Rangers. Rita's actions reflect her ongoing vendetta against the Rangers and her desire to exploit their vulnerabilities.
Minh, as the daughter of Trini Kwan (the original Yellow Ranger), faces specific emotional and psychological hurdles in taking on the mantle of the Yellow Ranger. Rita’s interference symbolizes the struggle Minh has to overcome her past, including her mother's legacy and the weight of expectation that comes with being a Ranger.
By creating obstacles for Minh, Rita aims to not only weaken the Power Rangers but also to force Minh to confront her fears and insecurities about stepping into a role that holds significant meaning tied to her mother. This conflict underscores the theme of empowerment, growth, and the importance of embracing one's legacy while carving out one's own identity.