Every single boss in New Super Mario Bros U for the Wii U beaten with 4 players.
00:00 Boom Boom #1
00:35 Lemmy Koopa
1:46 Boom Boom #2
2:33 Morton Koopa Jr.
4:02 Boom Boom #3
4:48 Larry Koopa
6:08 Boom Boom #4
7:05 Wendy O. Koopa
8:26 Bowser Jr. #1
11:36 Boom Boom #5
12:21 Iggy Koopa
14:35 Boom Boom #6
15:24 Sumo Bro
16:26 Roy Koopa
17:47 Kamek
19:21 Ludwig von Koopa
20:55 Bowser Jr. #2
22:40 Bowser and Bowser Jr. (final boss, ending, and credits)