There is also this glitch and I use version 5 it happens with all other mario costumes except doctor (the weird giant fluctuating sparks on Mario's Neutral B) Ice Mario's Up+B has no coin effect but Fire Mario's does. And I agree it's hard to see the snowball. It needs to be whiter.concerning the ice mario pack, i noticed that when i use regular mario, when i neutral b, the sparks are blue now and the little circle around his palm freaks the hell out and gets huge randomly.
http://imgur.com/uZ00yS1,iCt26mw
http://imgur.com/uZ00yS1,iCt26mw#1
i'm using version 2 btw.
I just tested your Marth glitch too but I couldn't recreate it.