http:// esta de más. Y debes especificar que las cookies son del subdiominio alpha.
Crealas asi:
Código PHP:
setcookie("pokemonrpg_jugador_id", $leer_datos["id"], time()+ 72000, "/", "www.alpha.pokemonrpg.org");
setcookie("pokemonrpg_jugador_cuenta", $_POST["c_nombre"], time()+ 72000, "/", "www.alpha.pokemonrpg.org");
setcookie("pokemonrpg_jugador_entrenador", $leer_datos["entrenador_nombre"], time()+ 72000, "/", "www.alpha.pokemonrpg.org");
setcookie("pokemonrpg_jugador_contrasena", $_POST["c_contrasena"], time()+ 72000, "/", "www.alpha.pokemonrpg.org");
Prueba eliminarlas asi:
Código PHP:
setcookie("pokemonrpg_jugador_id","",time()-3600,"/","www.alpha.pokemonrpg.org");
setcookie("pokemonrpg_jugador_cuenta","",time()-3600,"/","www.alpha.pokemonrpg.org");
setcookie("pokemonrpg_jugador_entrenador","",time()-3600,"/","www.alpha.pokemonrpg.org");
setcookie("pokemonrpg_jugador_contrasena","",time()-3600,"/","www.alpha.pokemonrpg.org");
header("location: ../index.php");
Suerte!