Bytecode Manipulation (Injection clients)

Hey there peeps!
Basically, I always loved blatantly cheating on shitty servers and I also like injection clients.
I don't know why, but the whole concept of closet cheating is not really fun for me so I thought to myself:
"Hey! Why don't I just make an injectable blatant client!". So yeah, I've tried reading through some
ASM docs to find out a little bit more about the ASM framework, but I haven't found any good times that
taught me something that I didn't know yet.
Any of you guys know any good ones?