brock with a geodude and onix
misty with a staru and starmie
Lt surge with a voltorb, picaku i think and a raichu
erika with a oddish gloom and victrebell
koga with a grimer muk and a
You beat all the gym leaders then the elite four
fight red
you cant
To find blue defeat all of the gym leaders and then go to cinnabar island blue will be there and will accept your challenge if you have defeated all of the gym leaders. Then go to viridian city gym and get through all of the trainers. After this you can also battle red.
need rainbow pass
Go to Mt.Silver and beat Red.
after you have beaten all the Kanto gym leaders, you can get through to Mt. Silver where you will find Red
After you defeat all the gym leaders in kanto go to the top of Mt.silver.
It depends on where you are with the other gym leaders. Once you've defeated Misty, make sure you have defeated all of the other gym leaders so you can battle Red. If you need to battle other gym leaders still, make sure you woke up that Snorlax in Vermilion.
After you beat all 16 gym leaders AND Red. The just go to his lab.
Red is not found in Saffron City. Red is found on top of Mt. Silver. He can be battled after defeating all 16 gym leaders.
after you beat all 16 gym leaders,he is at the top of Mount Silver, so talk to him to fight