Mega Man Battle Network 4: Blue Moon
Game Boy Advance   
 Hard mode:

 Beat the game on Normal, then select Continue.
 Super Hard mode:

 Beat the game on Hard, then select Continue.  
 Higsby Number Trader codes:

Number Man Lotto Codes:

HOW TO GET THE NEBULACD:

First jack in from an outside area such as Netfrica. Work your way into undernet4, there you will find Solar Boy and he will say he battled Shademan and traped him in this coffin. He wants to destroy shademan once for all but he can't use absorb sunlight down this far in the net. He has a s.sensor but he droped it in undernet2 while battling Shademan. Go back to undernet2 and a purple navi will say he found the S.sensor but a guy stole it from him.So you have to go find him. He is in undernet6  it's a black navi pacing back and forth. Talk to  him and he will say he will sell you the S.sensor for ten thousand zennies. Buy it then go back to Solar Boy and give him the S.sensor. Solar Boy tells you to lift up your PET and yell something (you don't have to do anything)then Shademan comes out. After that go up to the coffin and you will find the nebulacd.Hope you have fun getting new things with the nebulacd.

Thanks to Revolution readers Jimmytron, pandaboy, snaZZu, brandon and Paige!