To be able to challenge red u must beat all sixteen gym badges. once u have done this make go to mt silver, climb to the top and fight him. (make sure ur guys r in the high eighties early ninties
With Pokemon.
go to prefacer.oke then you get one stear pokemon
You finish Pokemon heart gold after you beat red.
They are still in the Pokemon league
Yes.
Any Pokemon 70+. RED'S Pokemon are Pikachu Blastoise Snorlax Lapras Charizard Venusaur
u r pretty much finished . you can beat the league again or just train
go to the place that you beat lance.after you beated him for the third time,hike up Mt.Silver and beat red to train your Pokemon to lv.100.
you don't get the red orb in Pokemon heart gold you get the blue orb that you use to get kyogre
I am pretty sure you get it after you beat red/ash on mt.silver and you get it at safron city,the big bulding
Nothing.thats it
Of course