This is the most fast paced stage in the game so be ready to take a quick snap of every thing, well u start off with some squirtle shells in front of you, hit them with pester balls and they will pop out onto land [o], moving on hit the magikarp that is jumping out of the water, it will jump onto land and the mankey will kick it over the hill, to your right you will see some geodudes hanging off the wall, hit them with a pester ball they will fall down [o], and sandshrew will pop up [o], move on and you will see 2 geodudes and a graveler on a wall, hit the geodudes with a pester ball and the graveler will fall down[o], and a sandslash will pop up [o], and you will go down a waterfall, you can randomly put pester balls in the water and a goldeen, dratini or magikarp will pop up, anyway you will see 3 gravelers on a wall, play the pokeflute and, they will jump down and dance (the 2nd song gets the most points), and the magikarp will fall down hit it and it will bounce into the water fall and evolve into gyarados[o], you will see a staryu or 2 in the air so take a photo of them and they will circle you[o], go along and you will see a whirlpool, the staryu will go into it and evolve[o], throw 4 pester balls into the whirlpool and a dragonite will pop up[o], go on and you will see some squirtles on a hill they will all run away except for one, hit it with a pester ball when it is line with the mankey, move around and you'll see the mankey close up[o], hit it with a pester ball to knock the switch and see Prof. oak's hut he will tell you about the signs, go
here to find them all