You can a Gyarados and level it up to 42. Now you learn Thunder Punch and Blizzard with it. Use also level up medicine. Such as Calcium, PP Max, PP Up, HP up, Iron, Zinc, and more.
With Pokemon.
4 Clair get a Pokemon with a ice/dragon move clairs Pokemon: GYARDOS DRAGONIAR(X2) KINGDRA. 4 blue his Pokemon are: EXEGGUTAR PIDGEOT ARCANINE RHYDON MACHAMP GYARDOS.
after you beat her go to dragons den and take the quiz from the grandpa
Pikachu
go to prefacer.oke then you get one stear pokemon
go through the ice path to blackthorn city and beat clair tp get the 8th badge
After you beat the gym leader before Clair that guy that was blocking your way before will let you through.
You finish Pokemon heart gold after you beat red.
You can beat the Elite 4 the 2nd time, do Gym Leader Rematches, More Legendary Pokemon, the new area's you can visit, beat Clair and Lance at Dragons Den, Do a Rival Battle at the Indigo Plateau
beat the Pokemon luegue then go to the Pokemon centre
Yes
They are still in the Pokemon league