Waterfall is an HM, so Feraligatr doesn't learn it by leveling up. If you have the Waterfall HM, it can be taught at any level.
feraligatr learns hydro cannon at level 74
you usually find totodile in wyvern hill and waterfall pond ( you need a Pokemon that knows waterfall or you have the hm waterfall in your tool box to access waterfall pond), its friend area is rub a dub river. At level 18 it evolves into crocanaw, at level 30 it evolves into feraligatr
Try either kingdra or feraligatr, they are absolute pwnage in battle and waterfall is a good move for them
you could either search for it in icefall cave or level up a seaking or a goldeen until it learn waterfall i got this info from http://bulbapedia.bulbagarden.net/wiki/Main_Page
Evolves into croconaw at Level 18 Feraligatr at Level 30
Feraligatr cannot learn Waterfall in Pokémon Gold and Silver, additionally it cannot be taught it via the HM.
Level 58 will feraligatr learn it
feraligatr learns hydro cannon at level 74
Sharpedo doesn't learn waterfall by level-up.
No, the last move it learns on its own is on Level 71. You can still make Feraligatr learn a TM or HM move however.
i think that wooper can't learn waterfall at a level.
Feraligatr learns Hydro Pump at Lv. 63.
Feraligatr can learn Hydro Pump at level 58 in Pokemon Crystal.
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There, Feraligatr can not learn Ice Punce Naturally You Have to learn Ice Punch By going to the move tutor Note : This only works for Pokemon Platinum, Heart Gold, and Soulsilver
you usually find totodile in wyvern hill and waterfall pond ( you need a Pokemon that knows waterfall or you have the hm waterfall in your tool box to access waterfall pond), its friend area is rub a dub river. At level 18 it evolves into crocanaw, at level 30 it evolves into feraligatr
You can teach Tentacool the move Waterfall anytime. Waterfall is an HM, not a move gained by reaching a certain level.