50 Lives
With 50 lives, you will have more chances to complete the Weasel boss sequence. To get these extra lives, pause the game and select the "Cheats" option to enter the cheat menu, then enter the code "BOVRILBULLETHOLE"
Easy Difficulties
To make the game easier, go to the cheat menu and enter the code "EASY." If you want to make the game even easier, enter the code "VERYEASY." The easier difficulty will allow you to have an easier time getting through the weasel sequence.
Skip to Weasel Boss Sequence
If you currently do not have access to the weasel boss sequence, you can get there easily by going to the cheat menu and entering the code "WELDERSBENCH." This will allow you access to all levels of the game, including the weasel sequence.
Context Pad
The best time to press the "B" button during the weasel sequence is right before the weasels stop firing their guns to reload. This will leave all the weasels exposed when you begin your slow-motion jump, and you'll have an easier time shooting them.