You can't catch it.
There is no Missingno. anymore.
Sorry to burst your bubble but, you can't. Okay.....There are some ways to catch a missingo! The awnser above is FALSE! If you download Advanced Map, and Add ? to any place, it will allow you to catch lv. 0 missingo!
nowhere r tarrd
pee wee Herman
i have been playing this game for three years and tried it tons of times and have not found it. i would recomened to stop trying. there is one cheat saying that you fly to cinnabar island and surf on the coast (left side) and go on it for a while you will find missingo and i think this is a load of bologna but you can try.
In Pokemon LeafGreen, Missingo looks like a question mark and has no moves! If you try to attack with it,it will freeze your game, so don't catch it!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Go to N00b Island. You will battle a Missingo. there. atch it. It has a hahahha noob attached.
Missingo cannot evolve in any games as it is a glitch Pokemon. The majority of the time if you use Missingo in a fight or if you catch him, it glitches your game. The best idea unless you're using a ROM is not to even catch him.
If it shows up as a question mark it is the missind Pokemon, Missingo. Missingo really isn't a Pokemon but it is a glitch Pokemon.
You can't catch it on Firered you can only catch it in Emerald
you can not catch him
missingo is not a real Pokemon but it is a glitch in the game