Pokemon Sapphire how do you catch a minus?

You can't catch a "Minus" in Pokemon Sapphire. There is no Pokemon called Minus.

It's possible you're thinking of a different Pokemon or misremembering the name. Could you double-check the name and provide more context about where you encountered it?

If you're struggling to catch a particular Pokemon, remember to use the right Poke Balls, weaken the Pokemon, and utilize status conditions like Sleep or Paralysis to increase your chances of capture.