Download RABCDAsm. Place the Client.swf in the folder of RABCDAsm. Drag the Client to swfbinexport.exe then open cmd. (Be sure you know how to use RABCDAsm)
Get the Ninja codes from the WIKI of ROTMG forums. Paste it on 108.bin then create katanas for ninja. Then swfbinreplace client.swf 108 client-108.bin
PS: COMMON SENSE.exe / BRAIN.exe is REALLY REALLY REQUIRED!
---------- Post added at 09:04 PM ---------- Previous post was at 09:01 PM ----------
Guys. I'm really tired so i'm really sorry for not posting the full tutorial. I'll try to post one Tomorrow.

I'LL TRY!! so please wait.