How do I get back on the St ANN is the ST ANN glitch real?

What the hell is that I never heard of it before

You can't,you can only go on the once.

You can only go on it once

No the glitch isn't real. You just get some people who claim these Glitches are real coz they wanna feel "special"! Also the Mew glitch is a load of cod, so if you want Mew, your best getting the cheats cartridge

The ship leaves for good after you have recieved HM01 from the captain.
But there is a way to make the ship stay. Kepp reading if you wanna know how:

First you must help the captain and get the HM. Then you must meet a trainer on the boat and LOSE to him/her. This will take you out to the Pokemon center without you having to exit the ship. You'll lose half of your Money in the progress so use as much of it as possible first.

Then you must return after you have recieved HM03 and go to the ship's dock. Then surf along the harbour. Entering the boat will cause it to leave.
Somewhere near the boat is a small truck. It doesn't seem to do anything though.

Note: Some people say that Mew is hiding in it but that's NOT true!

You can get back on the ship. This is what you do:
Go up to the guy that says that the ship set sail. Turn right as if you were going to surf and turn the game off and turn it back on. If you are facing down, use surf and you will surf on the guard. (If you are not, try again). Keep going down to find the ship. If you surf to the right you'll find a truck. If you surf in the direction the ship is supposed to go, there is just a wall there. The ship did not leave.

Actually once you have the passes to the islands you can get on it as much as you want.

The only way to get on the St. Anne again is to leave some trainers left over so they can beat you. Once they beat you, you are transported back to a Pokemon centre and the ship is still there. This is after you get the HM01 technique and beat your Rival first. There really isnt any point to going back on the ship again though.