You need a GameShark. So you get this code that takes you to Navel Rock. Use the upstairs ladder and Ho-Oh will be there. If you want ...
Lugia
you have to use the downstairs ladder. You can get both Lugia and Ho-Oh. You can do the same in Pokemon FireRed and Leafgreen.
P.S You have to use the Mystic Ticket
P.P.S If you have the Aurora Ticket, you go to Birth Island to catch Deoxys
P.P.P.S Use the Old Sea Map to get to Faraway Island to get... MEW!
navel rock
You may capture a Machop in Fiery Path or Jagged Pass in Pokemon Emerald.
You still play pokemon, wow your a NERD!!!!
first you have to use cut on all the grass in the game then hoho will come and attake you.
You can't without trading, migrating or, cheats
You can find and capture pokemon in the grass,water..:) use pokeballs to capture them once you find them...:) cheers!!
Eat Them
at the spear pillar
To get ho-ho or lugia you will need to get the mystic ticket from the Pokemon events and take the ferry to navel island.
Yes emerald can and you can get a sunflora from Pokemon colosseum.
capture legendary Pokemon like rayquaza.
You can catch Hoho at night.