no
yeah however you won't find Entei if you didn't start with Bulbasaur.
You don't get the national dex until you beat the elite four and yes, you have to have the national dex to get him because entei is a distant legendary you can only find in the early games. So you need the national dex, but not before you beat the elite four.
You can only run into Entei if you starter was a Bulbasaur and you beat the elite four. There is no specific spot where you can find him at but once you run into him use your master ball and catch him.
you can find them in Pokemon leaf green /fire red after you beat the elite 4 and the champion Charmander - Suicune Squirtle - Raikou Bulbasaur - Entei how do you find them?
there is an easy way first i dont know but you have to beat the elite 4 lots of times then go to bill and he will show you his garden and just search right there and he'll be there
you have to beat the elite 4 the second time and you will find the legendary dog that is opposite to your starter type while walking around
Entei will appear if: You chose bulbuasaur as your starter Pokemon and if you beat the elite four obtained the national dex and gave the ruby and sapphire to celio. Once all of this is completed you can find Entei on any route where grass is, you can't find it on the islands. I suggest you go to Route 1 to find it because it usually goes there.
Go to pk locater and find entei in a room. You can go to this room ID: #178202. But to catch him you have to buy a masterball beat the Hoenn leaders Indigo leaders Johto leaders and the elite four. Then with the Masterball catch Entei and other legenderies. Hope this helped
after you beat the elite four, if you started out with squirtle, it will appear randomly in the wild. same thing goes if you started out with charmander, you get suicune. if you started out with bulbasaur, you find entei
beat the elite four 12 times and you will find her in the cerealian cave
Entei randomly appears in the world map after you have beaten the Elite Four, and if you chose Bulbasaur as your starter Pokemon -creepyjean- ^^ hehe
In Gold, Silver, Crystal, Fire Red, and Leaf Green, no. If you KO them, you'll never find them again on that game file. In any games starting from Generation IV, however, you can KO them as many times as you want, and they'll always come back…after you beat the Elite Four and Champion again, that is.