Well happyness is not something you teach (i could be wrong) but if you want your pokemon happy ( think that this is what you want) to go goldenrod city and give it haircuts (all pokemon) hp ups and other things like thta will also raise the pokemon's happy status!! I hope this helps!
It evolves through happiness
Feraligatr can learn Hydro Pump at level 58 in Pokemon Crystal.
There is no kind of TM in Pokemon Crystal version that can teach your Pokemon ice beam. The only way to get it is to learn it naturally.
Get it to full happiness then go to Drayden's House. He'll teach it to you.
Simply train it a lot of levels.
i don't think it possible
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i would say oddish or its evolution form cause my cut is with oddish
See if there is a person that will look at your Pokemon and tell its happiness if there isn't a person in the game that doesn that teach the Pokemon Return keep using it until when it uses the moves it almost doesn't stop moving that is when your Pokemon is the happiest.
Marill. You can get it in Mt. Mortar if you just walk around for a bit.
In Pokemon Liquid Crystal, HM Fly is given to you by an Aide in the Goldenrod City Department Store after you have received the Glacier Badge. You can then teach the HM Fly to one of your Pokemon to fly to different locations in the game.
in goldenrod the house above the bike shopp a lady tells you how happy your top Pokemon is