I don't think I'll use those, wanna beat this game all by myself without any help. ( Them infinite 1-up spots)
I remember there were some in SMB.3 and NSMB DS. I hated the DS one, too easy to get 99 lives... >_>
I spamed the hell out of it, though.
Tag (Courtesy of Fkusumot) "If I'm posting in this thread then it's probally a spam thread."