Give it items, train it, catch the pokemon you want to train in a friend ball or luxury ball then use it often, use your pokemon often while it holds soothe bell.
A lady in the pokecenter in Eterna city will give you it.
Go To Pastoria City,then go do the safari game. Catch six different kinds of Pokemon and the girl by the counter in the great marsh building will give you the friendship checker.
You need it as your first Pokemon, and use it in battle a lot. There should also be a girl someone where in the region, and she'll give your Pokemon a massage. Which will raise the freindship with you. There are also berries to give to your Pokemon and that will riase their friendship, but lower a stat. But, I think there is also a place to get ribbons in the Resort Area. Get your Pokemon some of those ribbons, and the friendship should go up. I did that with Milotic, Gardevoir, and Ninetales and now they all love me.
In Pallet Town Daisy Gary's sister will check your pokemon's friendship.
Talk to the girl in Eterna City Pokemon Center and she will give you the Friendship checker. To check your pokemon happiness, just click and hold one of your pokemon in the Friendship checker. The number of hearts shows how happy your pokemon is.
If you put Soothe Bell on a Pokemon or give it Pokeblocks.
Fly/walk to Eterna City and go into the Pokemon center. Talk to the girl inside there and she will give you the friendship checker.
give the Pokemon irons, calcium proteins and all that stuff
It has a friendship evolution into Crobat. Just use it in battles, give it poffins that it likes, or give it berries that raise friendship.
Train your pokemon, Give it items, Have it hold the item Soothe bell.
A lady in the pokecenter in Eterna city will give you it.
give it the oval stone when it has high friendship
To get a good Pokemon simply give full friendship and avoid being fainted in battles. Give him drugs (carbos, protein, zinc, etc) that will give him friendship too. And for more perfectly Pokemon trade it to ruby, Sapphire or emerald give him the apropriate poke block (according to his nature). Soothe bell may help u too by giving him faster friendship. And the most difficult last part is.......patience.
To evolve eevee intoVaporeon- Give it a water stoneJolteon- Give it a thunder stoneFlareon- give it a fire stoneUmbreon- give it friendship during the nightimeEspeon- give it friendship during the daytimeLeafeon-battle a Pokemon and win with eevee by the mossy rock in eterna ForrestGlaceon- battle a Pokemon with eevee and win by the icey rock at route 207
Carry it around with you and battle with it. You can also give it certain items to boost friendship. It just takes some time!
you have to level up at a high friendship level.
make it hold a soothe bell. make any pokemon hold the soothe bell and it'ss increase it's friendship