There is NO air cutter glitch to my knowledge, even in the hacked version you're playing.
The easiest way to find larvitar is to look on route J. It may take a while but you will find it
In the middle of the city, you sleep like a baby.
one can be find at mt fiery and the other at magma's hideout.
If you are playing the normal version you can find him in the desert area at levels 20-23.
As far as I know they got rid of it because it was a glitch. Sorry
In Flora sky the HM 'cut' is actually called HM air cutter. You find this HM in the underground tunnels of Searound city.
in the toilet
Glitch for it! On Google type in: Tweaking glitch for Pokemon Platinum. find out how to do it and then Type in: How to get darkrai using the tweaking glitch on platinum.
if the game has a glitch
You can find this information on bulbapedia, but some well known ones are Glitch City, Mew Glitch, Missingno. Glitch, and there are limitless glitch pokemon.
The easiest way to find larvitar is to look on route J. It may take a while but you will find it
You find him in the cave
Misingno is is a glitch Pokemon in Pokemon red, blue and yellow. It's possible to find it by the old man glitch and the mew glitch.
hi you get it by trading gts action replay glitch
If you mean HM01 Cut, you can get it from Cutter Man in Rustboro City. His house is beside the Pokemon Center.
there is no missingo in diamond or pearl as these games were made to be free of that glitch
In the middle of the city, you sleep like a baby.