Where is mole tunnel in fossil fighters at

Its in secret tunnel 4 in the back after you beat the main part of the game.

Heres what happens in the secret tunnel and how to solve it:

Secret Tunnel 1: The mole wants your help to find its friend.
Secret Tunnel 2: Follow the O path (not the X path) 3 times to move on.
Secret Tunnel 3: Don't open the treasure box because theres nothing in it and follow the path where the box is 3 times.
Secret Tunnel 4: Search for the mole, talk to the him, and return to the enterance of Secret Tunnel 1 to get the Mole Mask