How do you get to the battle frontier in Pokemon HeartGold?

Answer 1

Follow These Steps To Enter The Battle Frontier

#1:Have strong Pokemon like in the 60s/50s

#2:Have some potions like (super) potions

#3:Make sure you have beaten the following gym leaders-Falkner,Bugsy,Whitney,Morty,Chuck,Jasmine,Pryce,Clair.

#4:Make sure you beaten-Will,Koga,Bruno,and Karen

#5:I have never been to the Battle Frontier (don't ask me why im answering becuz Im right)

#6:The Battle Frontier is now opened

#7:Enjoy
Go to Olivine City, go west... Then go into the "green thingey" apparently there is a sleeping man in it, so u can´t go in it... U need 2 beat Pokemon league and then u can go into the "green thingey"... and u can reach Battle Frontier!