With the win, the Cyclones will play the Tar Heels in the championship, while the Green and White will take on Oregon in the third-place game on Sunday at 1 p.m.
Not only is MSU tasked with facing two top-18 teams, the Spartans will also be without sophomore forward Matilda Ekh.
After a slow start, MSU pulled away by limiting Oakland to just nine combined points in the second and third quarters.
The last time the Broncos came away with a win against MSU was 40 years ago in 1982 in Grand Rapids. MSU is 7-3 all-time at home against Western.
Senior forward Taiyier Parks scored a career-high 18 points to lead the MSU women's basketball team (2-0) past Purdue Fort Wayne (1-1) 85-53 on Thursday night.
Gabby Elliott and Kamaria McDaniel led MSU in scoring at Sunday's exhibition with true freshman Theryn Hallock standing out too.