mugg1991 | mewtwo ☄️ @mugg1991 | Uploaded August 2017 | Updated October 2024, 8 hours ago.
You can do crazier stuff but the glitch doesn't comply sometimes. I'm actually not sure this stuff can be done on console. Sometimes Dolphin shows no error and you can do crazy stuff for days. Other times there would be "illegal read" errors, which doesn't freeze the game on Dolphin but I assumed those errors would be equivalent to the game freezing on console.

The glitch used in this video is known as Soul breaker.
ssbwiki.com/Soul_breaker
It is done by using side-B on an opponent while also countering a too strong projectile. If you do it to freeze a Mewtwo that already has a frozen character himself, then it can lead to separation of hitbox and graphics which can then crash the game in most cases (for example, when the glitched character tries to attack other players or if you try to attack the hitbox). But when I played around with this bug the other day, it didn't freeze at all on Dolphin.

Unfortunately I wasn't able to present all the crazy stuff since the bug sometimes won't comply. I don't know the conditions. Otherwise I could have thrown people around in the background or attack my "host" to throw myself around the stage. I hope maybe someday I can make another video showing this.

Also, in the end of this video, player 2 was in player 4's grab but player 4 could do anything. This would lead to either player 2 dying instantly or the game throwing errors as soon as player 4 walks forward. I opted for the latter, ending the video on a crash again.

I might make more videos like this. (but no promises)