Unfortunately, Entei has no set location in Pokemon Crystal - he always moves around. The only time you really 'see' him is in the Burned Tower in Ecruteak City (4th badge). Once you enter the tower, go left, up, right, and down until you see your rival. Battle him. Once you've defeated him, you will fall to the bottom floor. There will be Raikou, Entei, and Suicune. You won't be able to battle any of them, but they'll jump around you and make their leave. After that, it's up to you to find Raikou and Entei.
Usually you'll see them at times you don't expect it on your adventure, but once you see them, you'll have their location in your Pokedex at all times. If you've seen Entei, for example, them go to your Pokedex and see where he is. Go to the area and walk around in tall grass. Use a repel or super repel to keep Pokemon at low levels away - Entei is the only Pokemon you care about. After a while, check where he is again and repeat.
Once you do see him, though, either use a Master Ball or put him to sleep. Entei and Raikou always flee at first chance, and then you have to do it all over again.
I preference pokemon crystal
It's located in vermilion city it's the house above the gym on the left.
There is no HM08 in Pokemon Crystal. Pokemon Crystal has only 7 HMs that are available to use.
You can get the Hard Stone from Arthur, who is located on Route 36 on Thursdays.
In Pokemon Crystal.
liquid crystal? do you mean Pokemon crystal if its Pokemon crystal the levels are 19 20 and 23
What the hell is a Pokemon crystal
It is located in Violet City where the first gym you encounter in the north of the city
In Pokemon Liquid Crystal, you can obtain HM Rock Smash by speaking with a man in Violet City. He is located near the Pokemon Center and Sprout Tower. After receiving HM Rock Smash, teach it to a Pokemon that is capable of learning the move, and then you can use it to smash rocks blocking your path.
You can't get Moltres in Pokemon Crystal, Only in Pokemon Leafgreen and Pokemon Firered. Including Pokemon Platinum.
To find the Ariel ace TM in Pokemon Liquid Crystal, you can head to the Goldenrod Department Store on the fourth floor. It is located in the TM shop there.
There is np VS. Seeker in Pokemon Crystal.