Big head mode:
Enter DEFORM as a name.

Champion mode:
Enter CUP as a password.

Bonus monohull boats:
Enter PLA as a password.

Minnow-class catamaran boats:
Enter MIN as a password.

Pike-class catamaran boats:
Enter IKE as a password.

Barracuda-class catamaran boats:
Enter CUD as a password.

Slalom level:
Enter L.R as a password.

Mine level:
Enter U.G as a password.

Fast boats:
Select challenge mode and enter ZOOOOOM or SPEEEED as a name.

Mini-boats:
Select challenge mode and enter COMPACT as a name.

Elongated boats:
Enter LONGONE as a name.

Large engines:
Select challenge mode and enter LARGE as a name.

Automatic turbo collection:
Enter HELP.ME as a name.