Pokémon Happiness

  A Trainer must have empathy with their Pokémon to be a successful Trainer...but sometimes it's difficult to tell just how happy your Pokémon are, and how much they like or dislike your actions involving them.
  Hi, my name is Erika, and I specialize in Pokémon Empathy!  Being a gardener and florist extrodinaire, I can tell how sensitive my Grass Pokémon are to foods that I give them and to how I use them in battle.  I have been asked to come here and teach you about Happiness and how it is affected by your actions.  I will also clear up some old myths like, "Give your Pokémon a Potion and use it in every battle to make it happy" and "Don't put your Pokémon in the PC Box, or it will become sad."
 

  The happiness of a Pokémon alters various tidbits of gameplay.  From effecting the attack power of "Return" and "Frustration", to defining breedability, happiness is something that you should keep an eye on.
  But just how happy is your Pokémon?  You can't look at your Pokémon's stats, and see "Happiness" listed right under Attack and Defense.  In fact, it's impossible to pinpoint the exact stat value of Happiness without a bit of work.  However, there is a way to find out the approximate range of your Pokémon's Happiness, as well as how to lower it and raise it.

  In Goldenrod City, there is a girl who will tell you how happy your Pokémon is.  This doesn't tell the exact numeric value of Happiness, but you can use the chart below to determine the approximate value based on what the girl tells you about your Pokémon's Happiness.

Value Girl: Notes:
250~255 It looks really happy!  It must love you a lot.  
200~249 I get the feeling that it really trusts you. Pokémon that evolves through Happiness evolve at this stage, when the value is 218 or higher.
150~199 It's friendly towards you.  It looks sort of happy.  
100~149 It's quite cute. "Return" can be gotten if it is more than this state.
50~99 You should treat it better.  It's not used to you. A Wild Pokemon starts at 70.  However, catching it with a Friend Ball will raise it to 200.  (Green Apricorns make the Friend Ball.)
0~49 It doesn't seem to like you at all.  It looks mean. "Frustration" can be gotten.

  So, how do you raise or lower this?

Raise Happiness Actions: Change if Happiess is 0~99 100~199 200~255
Level Up* +5 +3 +2
Doping Item (ie Protien, Carbos, Calcium) +5 +3 +2
Hair Shop (Older Brother) +1, +3, +5 +1, +3, +5 +1, +1, +2
Hair Shop (Younger Brother) +1, +3, +10 +1, +3, +10 +1, +1, +4
Daisy's Fur Grooming (only the hour of 3 o'clock PM!) +3 +3 +1
Walk +1 (every 256 steps) +1 (every 256 steps) +1 (every 256 steps)
Battle (Gym Leader, Elite Four, Lance, or Red.)
(Note: The happier the PKMN, the less it raises.)
Have on Belt +3 Have on Belt +3 Have on Belt +1
Lower Happiness Actions: Change if Happiess is 0~99 100~199 200~255
Use Energypowder -5 -5 -10
Use Heal Powder -5 -5 -10
Energy Root -10 -10 -15
Revival Herb -15 -15 -20
Faint in Battle (or from Poison, etc.) -1 -1 -1
Trade Returns to 70. Returns to 70. Returns to 70.
Place in Pokémon Stadium GS Box Returns to 70. Returns to 70. Returns to 70.
Raise Myths:
Use a Potion, or other recovery item. Myth    
Heal at the Pokémon Center. Myth    
Lower Myths:
Place Pokémon in Bill's PC. Myth    
Don't play Pokémon game for long time. Myth    
*In Pokémon Crystal version, when you catch a Pokémon, its "catch location" is remembered.  There's an old lady in Cianwood City who can tell you were your Pokémon was caught.  This data will be lost if the Pokémon is traded to a non-Crystal Version.  This is important because if a Pokémon raises a level which in its "catch location," then its Happiness will raise double what's listed on the chart above!
 

How does the "Haircut" effect your Pokémon?  There are three values, and you know which value your Pokémon's Happiness is raise by the message that the Hair Cut Brother says:
Message Happiness Change Percent Chance of Getting
[Pokémon] looks a little happier. First Value 60%
[Pokémon] looks happy. Middle Value 30%
[Pokémon] looks delighted! Last Value 10%

Day of Week Hairdresser Change (if Happiness is 199-) Change (if Happiness is at 200+)
Sunday Younger Brother +1, +3, +5 +1, +1, +2
Monday Closed +0 +0
Tuesday Older Brother +1, +3, +10 +1, +1, +4
Wednesday Younger Brother +1, +3, +5 +1, +1, +2
Thursday Older Brother +1, +3, +10 +1, +1, +4
Friday Younger Brother +1, +3, +5 +1, +1, +2
Saturday Older Brother +1, +3, +10 +1, +1, +4

  So, what are the best ways to raise Happiness?  Well, Doping items, such as Calcium and Iron, also raise Effort Value, so that's raising two things with one item.  You can use up to 10 of each Doping item, raising Happiness up to 50 points per 10 Doping items used.  With 5 different types of Doping items, you can raise the Happiness up to 250 points or higher, exceeding evolutionary requirements.
  However, another way is to battle the Elite Four and Lance.  You'll also get EXP and money as well.
  Getting your Pokémon's hair cut or taking it to Gary's sister each work only once a day, and aren't really worth the time or money.

As mentioned above, some Pokémon only evolve if they are happy.  The unusable Pokémon number 000 evolves by Happiness, evolving into a Nidoran(m)!