I don't know if this happened to someone else, but "Literally" I can't find to Entei and Suicune (Wich is roaming now because I defeat him during the battle in Tin tower)...I chased them using the pokedex, and using the classic strategy that consist in have a pkm in level 40 or lower in 1st place, and use repellents to guarantee that the pokemon will appear fast by walking in the grass...the problem is next:
Even in the right place, and walking for every centimeter of the grass, the pokemon never appears, and this happened on many routes over and over again, it should be clear that this did not happen with Raikou, who in fact had already found in the game, also...in an occasion, according to the pokedex Entei and Suicune were in the same route that I, and after countless minutes chasing them... none appeared
I finally finished the chase, frustrated ... and without any repellents