The world record for Punch Out!! Stage 4 is 33.5,"But how do you get this time"? Here's how:

First knockdown: The first knockdown is the easiest, all you have to do is punch Von Kaiser in the face twice. A way to do this is to buffer* your punches. You should have a star by now.

Second knockdown: Von Kaiser will always get up at one, which is good because in punch out when a fighter gets up at one they can be knocked down with one star punch, but first you have to pickup another star, to do this you must hold up and when Von Kaiser goes down do do his uppercut you must press the B button twice. You only want to get one star from these two punches but sadly it's random if you get one or two stars from these punches. If all of these went right then all you have to do is buffer a star punch, and he should be knocked down at 12 seconds on the clock in the upper right corner.

Third knockdown: Von Kaiser MUST get up when Mario (the referee) says "Two." If he gets up any later than the run is over, and yes this is random too. If Von Kaiser gets up at the right time all you have to do is duck** down at the right time and buffer a star punch, for this run to be a world record the clock in the upper right corner should be at 19.

*Buffering is when you input your next move while you're still in a move's animation.

**Ducking is just hitting down on the d-pad twice.

Examples: