How do I raise happiness in Pokémon Crystal?

Question

So, I was playing Pokémon Crystal, trying to evolve my Pichu. My only problem is happiness. Is there any way I can up its happiness quicker in Pokémon Crystal?

Answer 1

In Crystal, you can raise a Pokemon's happiness in the following ways:
Having your Pokemon groomed by the Haircut Brothers in the Goldenrod Tunnel. (amount of friendship gained varies, see my source below)
Leveling up anywhere excluding the Pokemon's met location. (+5 at 0-99 friendship, +3 at 100-199 friendship, +2 at 200-255 friendship)
Leveling up at the Pokemon's met location. (+10 at 0-99 friendship, +6 at 100-199 friendship, +4 at 200-255 friendship)
Using a vitamin (HP Up, Protein, Iron, Calcium, and Carbos) (+5 at 0-99 frienship, +3 at 100-199 friendship, +2 at 200-255 friendship)
Battling a Gym Leader, member of the Elite Four, the Champion, or Red. (+3 at 0-99 friendship, +2 at 100-199 friendship, +1 at 200-255 friendship.
Having Daisy Oak groom your Pokemon. (+3 at 0-199 friendship, +1 at 200-255 friendship)
Walking 512 steps. (+1 at any friendship amount)
Learning a TM. (+1 at 0-199 friendship, 0 at 200-255 friendship)
Using a battle item. (X Attack, X Defend, X Speed, and X Special) (+1 at 0-199 friendship, 0 at 200-255 friendship)

Source