Did I brick my game at the Giant Steelix?

[Silversixx]

I have kinda just brute forced my way through the game thus far, have not caught very many pokemon at all.  I am at the part where the level 75 steelix shows up and he just wrecks my level 55 team, one shots them all.  I don't think I can leave this cave, wtf do I do?

[RyanErgo]

I played a long time ago, so maybe I am remembering incorrectly. But I used sturdy Ggravelers with moves that collapse the cavern.