I've been looking into trying out a run at some point, and in doing so I ended up writing down all the passwords for the different levels since they're the same every time. It looks like there aren't unique ones for any collectables though, so this is mostly if you're looking to practice specific segments.

Easy Mode

Palace 2: Palace, Ollie, Brietta, Palace

Palace 3: Wand, Brietta, Ollie, Palace

Palace Bossfight: Wand, Brietta, Palace, Brietta

Snow 1: Annika, Palace, Annika, Wenlock

Snow 2: Annika, Annika, Wand, Annika

Snow 3: Annika, Wand, Palace, Wenlock

Snow Bossfight: Palace, Annika, Annika, Wand

Forest 1: Annika, Palace, Ollie, Wand

Forest 2: Wand, Annika, Palace, Palace

Forest 3: Wand, Wenlock, Annika, Wand

Forest Bossfight: Ollie, Annika, Brietta, Annika

Ice 1: Wenlock, Wand, Palace, Ollie

Ice 2: Wand, Wenlock, Annika, Annika

Ice 3: Wand, Wenlock, Annika, Annika

Ice Bossfight: Brietta, Annika, Palace, Wenlock

Final Boss: Palace, Annika, Annika, Annika, Annika

Normal Mode

Palace 2: Wenlock, Brietta, Annika, Ollie

Palace 3: Palace, Wand, Wenlock, Brietta

Palace Bossfight: Palace, Wand, Barbie, Wenlock

Snow 1: Annika, Brietta, Annika, Palace

Snow 2: Wand, Palace, Ollie, Palace

Snow 3: Wand, Brietta, Ollie, Wenlock

Snow Bossfight: Ollie, Ollie, Wand, Wenlock

Forest 1: Palace, Ollie, Wenlock, Wand

Forest 2: Wenlock, Wenlock, Brietta, Wand

Forest 3: Wand, Palace, Ollie, Annika

Forest Bossfight: Brietta, Wenlock, Ollie, Wand

Ice 1: Annika, Wenlock, Annika, Wand

Ice 2: Wenlock, Wenlock, Ollie, Wenlock

Ice 3: Brietta, Wand, Brietta, Annika

Ice Bossfight: Annika, Palace, Wenlock, Palace

Final Boss: Ollie, Palace, Wenlock, Wand