Through a cheat device or by trade only.
Entei, Suicune, and Raikou are not available in Pokemon Emerald, Ruby or Sapphire. They can be brought into the game by trading.
Raikou is best because entei and suicune are fegget Raikou all the way 2 reasons He is way cooler then Entei and Suicune. Number 2 he could whoop Suicune and Entei in a battle So suicune and entei are good but overall raikou is better
Starter:Charmander-Suicune Squirtle-Raikou Bulbasaur-Entei
Entai = Fire Suicune = Water Raikou = Electricity
suicune is a rubbish Pokemon, if ya want it its not in emerald, its in Pokemon silver gold ruby and sapphire, ( they got rid of entei raikou and suicune to make way for rayquaza )
You chase Entei and Raikou across Jhoto and you catch Suicune at the top of Cerulean City.
Entei Raikou
try to answer thoughtful
You get suicune,raikou,or entei depending on your starter pokemon (charmander = suicune squirtle raikou and bulbasaur entei) and you can get mewtwo in cerulean cave
suicune, entei and raikou in leaf green and fire reed after unlocking he national pokedex and it will depend on ur starter pokemon: charmander - suicune; bulbasaur - entei; Squirtle - raikou groudon, kyogre, latios and latias on emerald luguia, ho-oh and deoxys: leaf green and fire reed but u need an action replay. U can also get deoxys in emerald, but with action replay
Entei, raikou and suicune
You can't unless you have joto