you make a stink bomb and then you'll need the blueprints so your character knows where it leads.
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.
you put the stinkbomb on the floor of the detention room and the teacher will leave then you click on the filing cabinet
Artur is in the secret room behind the file cabinet. (He was hunting for the Time Capsule.)
you can not. you have to go in it.
in the detention room.
in the cabinet on big Nate island
Among the tons of junk crammed into the locker is the blueprint to the school. It shows the secret room behind the filing cabinet in the detention room. (see related question)
The "blueprint" in Big Nate's Locker (combination 9305 is on the comics) shows the location of the "secret room" in the school. It is in the Detention Room, behind the filing cabinet. To get there, you will need the gum and the stink bomb. Chew the gum, use the stink bomb, and go behind the filing cabinet. (see related question below)
You leave him in the hideout
It is behind the filing cabinet. You must open Nate's locker on the second level. Pick up the blueprint from the pile in front of it. (see related question)
set of your stink bomb to get to the filing cabinet and when your inside the cabinet you will figure it out from there.your welcome
As you go into the floor behind the filing cabinet in the detention room, the light switch is right at the bottom of the ladder, on the floor.