How do you do the 256 glitch in castle crashers

To do the lvl 256 its very complicated.
First you will need 2, 2!!!! gold member ships
2nd go into a xboxlive game mode and whatever guy u want to have the 256s u hit b when the timer says 2
3rd do it 1 more time
4 get rid of the other character
5 CONGRATS UR LVL 256!!!!
P.S(ive done this)