Press the following at the select song screen ( assuming the numerical pad acts as the dance pad ) Note: This Codes only works for NX2 And newer Mixes.

Code	Effect
157359795	Appear Mode
97975	Decrease Speed
719371933	Drop
71593717931	Hard Judgement
7779991113335	Random Skin
117799335	Rise
771133995	Sink
9753197531	Snake
111777915	Yasangma Skin