You went to lavender town and did not find evee where is evee in leafgreen?

you can find an evee on the top floor of the building where the old lady gives you the tea
Where the building is where you get the Tea from the women you have to go behind the Pokemon center of Celadon City and enter the building through the back go all the way up and you will find the evee by the karote guy on the table Evee will be at level 25 go get em.