What moves does feraligatr learn?

feraligatr only learns like 5 or 6 moves plus the option of hydro cannon so im going to tell you all the moves through out the day you get/got tododile to the day you get a lv 100 feraligatr. feraligatr starts with 2 moves scratch & leer then he learns water gun,rage, bite, scary face, flail,agility,crunch,slash,screech,thrash,aqua tail,superpower,and lastly hydro pump.somewhere in there he learns ice fang but i don't know when since i kept it forever

bonus:once you get to blackthorn city there is a house on the left of the Pokemon cednter it will have four people talk to the old man on the right he will ask you if you want an ultimate move (for feraligatr) tap yes and he will teach your feraligatr hydro cannon

p.s. i don't know the levels