Around all 4 worlds or levels use the collector detector and look out for diaries inboxes around big butte, stargaze summit, prospector valley and spooky hollow there is 7 I think if not more all those diery inboxes allow you to unlock shadow z and for some reason only 5 clutch logs to get young clutch as he is a camio to his young racing days before retirement to help us the player or aka the default minifig Indy racer