In the drawer cabinet in the detention room.
This is what you have to do, When the girls go to school Get the snack for the Dog in a SECRET place!
in the cabinet on big Nate island
up your butt
let the stink bomb go
In the file cabinet, in detention, in the school.
Get the clapper. Then go out and put the clapper on the bell (outside of the school)
you do out of the school do to the top of the school and put your bell on then go to the playground and give the dog the crackers and he will dig and you will get you treause
Artur is a kid from Big Nate's school on "Big Nate Island". While searching for the lost Time Capsule, he became trapped in the "secret room" behind the filing cabinets in the Detention Room.
In Nate's locker. The combination is on the assembled comic strip.
It is in the secret store room behind the filing cabinet in the detention room on Big Nate Island. You need the blue prints from Nate's locker in order to access the secret room.
Click the locker again and you will get a map of the school, revealing a secret room under the file cabinet.
They are in Nate's overstuffed school locker, second floor of the school. The combination is 9305 (entered vertically), which you learn from assembling the comic book pieces. The blueprint shows there is a secret room behind the Detention Room.