yes
By TM.
lugia, latios, and umbreon
You cannot get an umbreon on Pokemon Yellow as they were only introduced in Pokemon Silver and Gold and from then on. You can only get Vaporeon, Jolteon, and Flareon on Yellow.
You take the eevee you get from bill in goldenrod city and you max your freindship (happiness) level at night, then it evolves into an umbreon. Got to go my pokegear is receiving a call, hope that helped.
eevees (on any Pokemon game) evolve into umbreon or espeon with happiness. happiness at night will result in an umbreon just as happiness in the day will be an espeon. to increase happiness, walk around with your Pokemon A LOT. i think its like 256 is 1 point. they evolve at about 250.
Most water type Pokemon can learn the move Waterfall.
Well give the pokemon stuff like protein or give it a soothe bell. Leveling up gives 1+ the happiness I am currently trying to get Espeon or Umbreon on my heart Gold I have gotten Umbreon before so, wish me luck!
Level 56.
yes he does
at level 35
Level 57
probebly dark pulse