Many thanks to anyone who can help us
EDIT: Okay we've managed to find someone who was able to help us solve the problem, but thanks to anyone here who could have helped us. For anyone interested the man in the junk shop was telling us that he'd only help us if we had a Dinosaur called ???? on our team, so once we had one of them he then allowed us to battle him and upon his defeat gave us something that we could give to the moleman in the mines, which then allowed us to progress through the game.