So is this bad?:
  new message[128]
  format(message, 127, "%d second%s left of Shadowcat Mode^nDon't get Stuck or you will Die", g_shadowcatTimer[id], g_shadowcatTimer[id] == 1 ? "" : "s")
  set_hudmessage(255, 0, 0, -1.0, 0.3, 0, 1.0, 1.2, 0.0, 0.0, 87)
  show_hudmessage(id, message)


should it be this instead (in the show hudmessage notice difference)?
  new message[128]
  format(message, 127, "%d second%s left of Shadowcat Mode^nDon't get Stuck or you will Die", g_shadowcatTimer[id], g_shadowcatTimer[id] == 1 ? "" : "s")
  set_hudmessage(255, 0, 0, -1.0, 0.3, 0, 1.0, 1.2, 0.0, 0.0, 87)
  show_hudmessage(id, "%s", message)


or even this (without a format)?
  set_hudmessage(255, 0, 0, -1.0, 0.3, 0, 1.0, 1.2, 0.0, 0.0, 87)
  show_hudmessage(id, "%d second%s left of Shadowcat Mode^nDon't get Stuck or you will Die", g_shadowcatTimer[id], g_shadowcatTimer[id] == 1 ? "" : "s")


Im really not following that post as to what is actually incorrect.