You defeat other Pokemon in battle or use rare candies
Repels make WEAK not strong Pokemon not appear
make sure you have strong Pokemon
Make sure to bring different types. Also make sure to bring strong Pokemon. A mix of a Tyranitar and a strong electric Pokemon will get you very far. Make sure to keep track of what Pokemon he has already used.
it is a disease but is good if you get it keep it in your party it will infekt other Pokemon it rases levels and make even a lv 50 Pokemon as strong as a lv 70 but if it is 100 it is as strong as a leygendary
Make sure your strong. Bring Lv.75-100 Pokemon
You can't find "strong Pokemon". If you want a Pokemon to be strong, you need to train it.
He is in Mt. Silver in the Kanto Region. But make sure you have strong Pokemon, because he is really strong. Red:pikachulv88 charizardlv83 venasaurlv83 blastoiselv83 snorlaxlv82 lapraslv80
yes. porygon2 is a strong Pokemon
Save your game also have a strong water type Pokemon with you and a Pokemon that can make groudon sleep.
That is up to your opinion. You can make your Pokemon Stronger by battling and all. There is no strongest because all of them can get pretty strong at some point.
You have completed the game. Congratulations! You could make your team as strong as possible or attempt to become a contest master. There is no end to Pokemon.
Arceus & Mewtwo both are strong than any pokemon.