There are a few ways to increase Happiness.
but be careful, for doing these will decrease their Happiness:
Makes your pokemon's happiness go up faster.
Go to Vendanturf town Talk to the lady in the house beside "Wanda's House" Note: the Pokemon that you want to check it's happiness must be in front of the line.
Maxing out the happiness of a pokemon is somewhat time consuming. Walking around with the pokemon in the lead position will help slowly increase the happiness. You can also feed the pokemon poffins to help raise stats and happiness.
To evolve Eevee into Espeon in Pokemon Emerald you need to raise it's happiness to max and level it up during daytime. To raise happiness you can keep the Eevee in your team for a while and fully healed up it should eventually reach max happiness to evolve in the daytime.
Level up an Eevee with full happiness at nighttime (after 6pm)
Golbat evolves into Crobat in Pokemon Emerald by full happiness.
Makes your pokemon's happiness go up faster.
There are a few ways to increase Happiness.Leveling up your PokemonWalking with your Pokemon (256 steps makes 1 point of Happiness)Giving your Pokemon Vitamins (Calcium, Iron, Zinc, etc.)Giving your Pokemon EV-lowering berriesbut be careful, for doing these will decrease their Happiness:Letting them faintUsing any Herbal medicine (Energy Powder, Heal Powder, etc. Using a Revival Herb can decrease their Happiness by 15 points.)Trading (it will reset their happiness to their base happiness)
It doesn't, sorry. You have to trade it from Pokemon Emerald, Pokemon Ruby, or Pokemon Sapphire. Togepi evolves via happiness and happiness didn't exist in LeafGreen.
if your Pokemon level ups, its happiness will increase automatically. but if you give your Pokemon a soothe bell, its happiness will increase faster, and it will evolve faster (by certain Pokemon). also return will do more damage
Go to Vendanturf town Talk to the lady in the house beside "Wanda's House" Note: the Pokemon that you want to check it's happiness must be in front of the line.
Maxing out the happiness of a pokemon is somewhat time consuming. Walking around with the pokemon in the lead position will help slowly increase the happiness. You can also feed the pokemon poffins to help raise stats and happiness.
To evolve Eevee into Espeon in Pokemon Emerald you need to raise it's happiness to max and level it up during daytime. To raise happiness you can keep the Eevee in your team for a while and fully healed up it should eventually reach max happiness to evolve in the daytime.
If you are talking about the Pokemon Riolu, it evolves through happiness. Feeding your Pokemon vitamins, keeping it in your party, and not letting it faint will increase its happiness.
Level up an Eevee with full happiness at nighttime (after 6pm)
Actually, quite a few. (It's called FRIENDSHIP, btw) 1. Golbat evolves to Crobat 2. Pichu to Pikachu (breed) 3. Iglybuff to Jigglypuff (breed) These are for Pokemon YOU CAN CATCH in Emerald.
None, the soothe bell is only used to increase happiness of your Pokemon you don't need it to evolve a Pokemon that evolves from happiness though it is a good idea to use it if you have it.