I think you find it on the way to the 8:th gym in the ice cave :)
in the cave between the mt moon and when you get to it then you use flash first, then you surf all the way up and there is a waterfall. one of your Pokemon have to know how to use waterfall, after the waterfall, surf all the way up and then you find a cave on the left and you enter in then you can find some where in the cave because i found it.
The way you get waterfall is by trading the waterfall HM from Fire Red Version or the other Version that have waterfall HM ( you can trade with a link cable or wireless adaptor)
You have to get the HM Waterfall, which can be obtained in Sunyshore city after beating the last gym.
When you get Rayquaza to stop Kyogre and Grouden from fighting Wallace will give you waterfall but then you have to get sootopolis gym badge to do it.
no way
You can find the HM for waterfall in Pokemon Soulsilver by first defeating the 7th gym leader in Johto. Go to Ice Cave and along the way you will find a man who has lost the HM. Find it and he will give you the HM for waterfall. Hope this helps!
If you have got the Silver Wing from the old man in Pallet Town on the Kanto map, then go back to Johto to the whirl caves. Go to the cave in the bottom right corner. You need whirlpool to get in there. Make your way through the cave until you get to a large waterfall. Go down the waterfall, and there would be a cave on the left when you reach the bottom of the waterfall. Lugia will be in there.
go to sunyshore city use surf on the route make sure you beat volkner any way use surf on the route keep going strate and use waterfall on the waterfall you will see a cave entrance go threw cave and use waterfall theres the POKEMON LEAGE
On your way to the spear pillar one of the rooms you have to go through has a big pond use surf and at the farest north is a waterfall.
u need Pokemon that can use surf waterfall whirlpool silver wing(an item) u might need flash but if u look at a walkthrough u can find a way without flash(i did that cause i lost flash i couldn't find it or a Pokemon with it)and i think that's it its more than 2 but ya
In Pokemon Gold/Silver/Crystal/Heart Gold/ Soul Silver you can have it as a starter but otherwise the only way to get it is from trading.
The Pokemon bocking your way is a Sudowoodo. To battle the Sudowoodo, you must use the Squirt Bottle on it.