how can i perform a stronk attack?
Your strongest attacks are the phantom fist, and the charged uppercut. You can do the phantom fist by holding the attack button for 1 second, then releasing. you can do the charged uppercut by holding down for a short while, then pressing up and attack quickly.
These 2 attacks take pretty long to start up, so your opponent can attack in the meantime. one of your faster strong attacks is the (regular) uppercut, which you can do by quickly pressing up/jump and attack at the same time.