Secret Boss
Complete the Yami Net Area survival tournament. At the 100th battle, Forte GS will appear and attack you. Defeat him to obtain his chip.

Secret Chip
In the Tournament's registry, input below:
Name : NE-tsu(small)-TO [Netto's japanese name]
Code : M9L1-24TZ-OQNU-MFZL-A6SY-HSA1
You will get Saito Style the chip automatically