i agree with helios, the if (%var == number) is a waste, i would use a txt or a variable

on *:TEXT:!8ball*:%chan: { 
  if (%8ballg == on) {
    var %x = yes|no|maybe so|i dont know|other answers
    msg $chan $gettok(%x,$r(1,$numtok(%x,124)),124)
  }
}