Buy ultra balls in Fuchsia city or Indigo Plateau.
Usually ultra balls are sold in the later cities try blackthorn city or the Pokemon league.
You can buy them in the Pokemart in Pastoria City
You can buy Ultra balls from any Pokemart after you defeat the elite 4. The cost £1200 each.
you can't buy ultra balls until you beat the 5th gym
You can buy them anywhere, but you have to beat some gyms. That makes the Pokemarts get new items.
Usually ultra balls are sold in the later cities try blackthorn city or the Pokemon league.
You will be able to buy Ultra Balls at all Poké Marts after earning at least three badges.
You can buy them in the Pokemart in Pastoria City
all after where you get the fifth badge
You can buy Ultra balls from any Pokemart after you defeat the elite 4. The cost £1200 each.
you can't buy ultra balls until you beat the 5th gym
Use your strongest Pokemon, do not attack, buy 15 Ultra Balls, 5 Great Balls, 20 Poke Balls, and 6 Timer Balls. Keep using the balls, save 5 of the Ultra Balls then use a few Timer Balls. They are guaranteed to catch Deoxys.
With a Master Ball , of course , Or what you can do is to buy , bunch of Ultra Balls , or other balls ( Ultra Balls are Recommended ) , Then go to that Rare Pokemon or Legendairy Pokemon ,¨ Then save in front of him , Then try to catch him by using all your Ultra Balls , If it doesnt work , just restart your game , and redo this until you capture it . *Hope it helped , Kruh.
You can buy them anywhere, but you have to beat some gyms. That makes the Pokemarts get new items.
Cinnibar island, Fuschia city, the Pokemon league and two island and the other islands.
The more gym badges you have the better the items you can buy at the POKEMART or you can just find one with the itemfinder which you get from proffeser oaks aid once you have 40 Pokemon registered into your pokedex. You generally need ultra balls for Pokemon over level 35 and i think once you beat koga(fushia city) or Sabrina( saffron city ) i think you should be able to buy ultra balls.
buy 5 ultra balls 5 timer balls and 5 dusk balls. cresselia is at the top the mountian. GOOD LUCK!