Bonus levels in the GB version are much more time-consuming than on any other platform, so it made sense to try to exclude as many as possible. In the NES version, the game keeps a counter of how many times you get 1st place. As soon as this counter reaches 3, the next level is a bonus level. In the GB version, the game keeps a counter of how many times you get first place in a row. So as long as I don't get 1st place three times in a row, I'm good.
With all possible bonus levels (1st place on everything), the lowest I was able to get was 1:10:40.
==GAME STATS==
Dark Gray: Walter, Spider, Mike, Joel Light Gray: Chen, Anne, Bonnie White: Cherry, Emilio, Jethro
1st place on: Breakfast Bends (1), Desktop Dropoff (2), Oatmeal in Overdrive (5), Cueball Circuit (6), Bermuda Bathtub (8), Potted Passage (10), Fruit Juice Follies (11), Bedroom Battlefield (13), Pencil Plateaux (15), Shrubbery Twist (17), Wide Awake War Zone (19), Pencil Plateaux (20), Leafy Bends (21), Chalk Dust Chicane (22) = 14 total.