Both the secret rooms between red and blue and the secret room between red and green can be accessed by digging into a painting on the wall in the middle of the machine path between the rooms. It can be accessed by going through the door on the side of the blue room and digging into the painting behind it. The secret room next to the blue room is small and cube shaped, has 4 short pillars, a small ghost, a treasure chest and a chao key box. There are secret rooms located next to the blue room, in the machine path between red and blue, in the machine path between red and green, as well as a small extra area next to the green room. Paintings that lead you to a new section when you dig into them look like this

As well you will often come across certain paintings on the wall that you can dig into and that bring you to a different section of the level or a secret room. Many pathways and rooms are blocked with grey doors that open after hitting a hourglass or wooden or metal boxes you can punch through. The machine path between red and blue has 2 puzzles and you have to solve one of them, depending which direction you go through. Red and blue room, as well as red and green room, are connected with machine paths. All of the rooms are connected to the pyramid core with narror corridors and slightly bigger rooms with stairs, pillars and obstacles, like enemies or weight lifts. The 3 triangle shaped rooms have different colours, red, blue, and green. The whole level is made up of 3 triangle shaped rooms in a triangle layout, and a huge round room in the middle of them, called the Pyramid Core. Map of the level, along with piece locations. On the right wall of the corridor is an entrance that is blocked with wooden boxes, punch through those and collect the upgrade. Get the hint either to the right or the left, hit the hourglass, go through the door that opened upon hitting the hourglass, you'll get to a corridor.

Roasted keys can be seen above the huge fire behind the spawn point, and 'Bugs on patrol' moves back and forth on the lowest part of the stair shaped ceiling with bugs on it. Jump up to the platform in front of you and turn around to check for the free pieces 'Roasted keys' and 'Bugs on patrol'.

Sonic adventure 2 upgrade locations