Glass Joe is already an easy character but you can beat him in about 30 (in game) seconds.
Step 1. When he does his taunt, punch him and he will move a little bit, as soon as he steps back to the middle, punch him again in the stomach and you should have 2 stars already
Step 2. After you do Step 1, punch him in the face 3 times and stop for a split second. Check to see if his gloves are up covering his face or down covering his stomach. If they are up, punch him in the stomach 3 times. If his gloves are down, punch him in the face one more time then punch him 3 times in the stomach. After the 3 punches, keep repeating 3 punches in the face, then stomach. After a while, you should get a star.
Step 3. After you get the star, he should do his taunt, as soon as he will step forward, use your 3-Star punch and he should go down instantly!
Von Kaiser is harder than Glass Joe, but this exploit actually makes him way easier.
Step 1. When he starts wobbling his head, counter him by punching his face. Do this 2 more times to get 3 stars.
Step 2. The fourth time he attacks, dodge it and then stun him. When he gets unstunned he should cover his face. As soon as he says “mommy” use your 3-Star punch to knock him down instantly.
I am planning on making more strategies, even TD Sandman. Just wanted to see if you guys want me to. I only know punch out wii strats though. Enjoy these two strategies for now!