Not only sub-40, but sub-39 too! Very improvable (especially Quibble Race, like a minute of timesave there alone), but not a big fan of this category, so probably won't return to this until someone beats me.

IGTs:

Barbuta: 5:13.651

Magic Garden: 4:50.708

Velgress: 3:14.501

Bushido Ball (2P): 0:52.133

Waldorf's Journey: 2:25.340

Hot Foot: 4:39.883

Pingolf: 4:03.350

Mortol II: 2:28.350

Overbold: 5:31.611

Quibble Race: 3:43.951

start time: 00:20.566 / end time: 39:10:800