That would be a very short one!
The shorter the waterfall, the less danger you will be in!
You have to have the HM waterfall, then go straight from green valley..then take a right, go down until you find a big waterfall ..go straight from there. :)
just use surf then go up to the waterfall and press A. to go down just run into it.
you go on route seventeen then go to route 18 when you get to a house, go down the stairs and you'll see a spot with grass if you go on it, the pokeball is waterfall hope I helped :)
your supposed to go down a waterfall
It goes very deep down
you have to win the battle at the sunnyshore gym then go down where jasmin is and talk to her and she will give you the hm waterfall.
you go to whirl island and go in a cave then down a waterfall and into a room.
You have to go to route 18. When you see the house by the female backpacker, go left past her. Then go down and a sage will be on the shore when you go down there. You will see an item on a ledge above - you have to go back and through the grass to get it. It will be HM 05 Waterfall.
You go down to the beach and get the HM Waterfall from the Johto Gym Leader (if you don't have it already) then surf to the giant waterfall. Use waterfall to get up it then go through the Victory Road.
after you defeat the elite 4 go to the front of the buliding and go back down the waterfall and go down it and find a girl who wants to team up with u and after her your there after you defeat the elite 4 go to the front of the buliding and go back down the waterfall and go down it and find a girl who wants to team up with u and after her your there
when you have both Pokemon go to the abaudant shrine northeast from black city. you need waterfall. go down the stairs till you see a waterfall. use waterfall on it. go up the other waterfall. go on land at the waterfall you came up from. go west(you may battle a hiker) and you see another waterfall go on that waterfall going down. go west on land you will see an enterance to a forest. go in. this is the abaudant shrine. try to get thru it. at the end you will find three kids. two kids start arguing(don't know why) (and make sure you have tornadus and thundurus in Pokemon party) and then the third kid(a girl) talks to you. when shes done talking you you will see this wierd thing(cant pronounce it) and talk to that. it will say tornadus and thundurus are shaking in there pokeballs! then landorus comes down and you battle him.
no when you go up (or down) the waterfall the gravity shifts and you just surf across.