No, Pokémon cannot evolve into Entei in any Pokémon game.
Entei does not evolve, nor any Legendary pokemon for that matter.
You can't, because Entei isn't in Sapphire. You'll have to trade one from FireRed/LeafGreen, where you have to choose Bulbasaur to encounter it.
No
Entei, Suicune, and Raikou are not available in Pokemon Emerald, Ruby or Sapphire. They can be brought into the game by trading.
in Pokemon sapphire poochyena evovles to mightyena
Spinda does not evolve.
kyogre does not evolve
Sableye does not evolve.
it does not evolve
no. he will never evolve in any game unless you cheat
You must transfer it from your Pokemon emerald, ruby or sapphire with Pal Park
no