Mario Kart 9 (2012)
[Nintendo Wii]
Beating All Mid Boss Battles in Boss Rush Mode against/with Master CPUs
Master Difficulty CPUs
4K (UHD) [3840p x 2160p] 60fps

Timestamps:
Boss Rush - Mid Boss Battles
00:54 - Lakitu
02:14 - Whomp
05:00 - Dry Bones
06:58 - Cheep Cheep
08:36 - Spike
10:35 - Bowser Jr.