You don't use it to find Entai, you have to find Entai in order to get it in your pokedex.
In order to get an Entai, your starter has to be bulbasaur. After you defeat the elite for, entai will appear in the wild anywhere.
there is no cheat to get entai. you go to the burned tower, go down the ladder, then the three dog Pokemon run. you track entai and raikou with the pokegear. suicuine you will find later in the game
Entai is a fire type legendary dog in the Pokémon games. If for whatever reason you can't catch him in the wild you can use an Action Replay code. You could find such a code online.
Any pokéball
to get entei in crystal you need to prepare and you could find him
You have to use palpark from a GBA game(pokemon)
you have to find barboach or use an action replay
You don't find a pokedex, generally the professor gives it to you.
well it says unknown area somehow you have to find it if you dont catch it check on the pokedex and whereever the map is covered red that is where it shall be there it moves a lot
get Pokemon ranger go on psypoke.com find the manaphy egg mission code. unlock the ranger net on ranger (beat raiku suicine and entai) use the guide on psypoke from here.
Use a good rod where you can find horsea use your pokedex if you seen one already.
Use the pokedex to find the area for mightyena then stay in the area to find it and start catching it.