Ok, I'll share it. First: Launch a PK Flash into the air, but get hit about when it starts coming down (best w/ a friend helping you do this) Then, launch another Ness's PK Thunder at yourself Aiming at the direct center of the biggest flash and pausing midway. If you do it right, the second Ness will have the properties of a PK Flash, but only for one hit.
It's sorta hard to do, but me and my friend experiment with it all the time.
It's sorta hard to do, but me and my friend experiment with it all the time.