Two things. 1, I used NCAA Game Sim for this and 2, I used Sports Illustrated's Bracket Watch as my bracket.
First Round:
1 Kansas over 16 Robert Morris
9 Arizona State over 8 LSU
5 West Virginia over 12 Liberty
13 North Texas over 4 Wisconsin
6 Penn State over 11 Utah State
3 Creighton over 14 Bradley
7 Michigan over 10 Marquette
2 Florida State over 15 Little Rock
1 Dayton over 16 Siena
8 Providence over 9 Oklahoma
12 Stephen F. Austin over 5 Ohio State
13 New Mexico State over 4 Oregon
6 Virginia over 11 East Tennessee State
3 Michigan State over 14 UC Irvine
10 Indiana over 7 Houston
2 Duke over 15 Northern Kentucky
1 Baylor over 16 Boston
8 Colorado over 9 Saint Mary's
5 Auburn over 12 Yale
13 Akron over 4 Maryland
11 NC State over 6 Iowa
3 Kentucky over 14 Belmont
10 Texas Tech over 7 Illinois
2 Villanova over 15 Winthrop
1 Gonzaga over 16 Eastern Washington
8 Florida over 9 USC
5 Butler over 12 Cincinnati
4 Louisville over 13 Vermont
11 UCLA over 6 BYU
3 Seton Hall over 14 Hofstra
10 Rutgers over 7 Arizona
2 San Diego State over 15 North Dakota State
Round Of 32:
1 Kansas over 9 Arizona State
13 North Texas over 5 West Virginia
6 Penn State over 3 Creighton
2 Florida State over 7 Michigan
1 Dayton over 8 Providence
12 Stephen F. Austin over 13 New Mexico State
3 Michigan State over 6 Virginia
2 Duke over 10 Indiana
1 Baylor over 8 Colorado
5 Auburn over 13 Akron
3 Kentucky over 11 NC State
2 Villanova over 10 Texas Tech
1 Gonzaga over 8 Florida
4 Louisville over 5 Butler
3 Seton Hall over 11 UCLA
2 San Diego State over 10 Rutgers
Sweet 16:
1 Kansas over 13 North Texas
2 Florida State over 6 Penn State
1 Dayton over 12 Stephen F. Austin
3 Michigan State over 2 Duke
1 Baylor over 5 Auburn
3 Kentucky over 2 Villanova
4 Louisville over 1 Gonzaga
3 Seton Hall over 2 San Diego State
Elite Eight:
1 Kansas over 2 Florida State
3 Michigan State over 1 Dayton
3 Kentucky over 1 Baylor
4 Louisville over 3 Seton Hall
Final Four:
3 Michigan State over 1 Kansas
4 Louisville over 3 Kentucky
Championship:
3 Michigan State over 4 Louisville
With that... Michigan State are now your official 2020 National Champions!