Spectrobes Codes -

DS Wireless Play:
Go to Genshi Area 1. Search below the person at the entrance to the forest area to find the Sigma Cube. This cube unlocks DS wireless play.

Wi-Fi:
Go to Nessa Area 2. Go to the right until you see a spire protruding from the ground. Search below the spire to find the Tau Cube. This cube unlocks Wi-Fi.

Card input:
Go to Kollin. Move downwards from your ship, then go to the right. When you find a tree, search under it to find the Upsilon Cube. This cube unlocks card input.

Giant Vortex rewards:
Successfully complete the game to unlock one of the following Giant Vortex. Then, complete all rounds in that vortex to unlock the corresponding reward.

Cyclone Geo: Daichi Area 1 vortex 
Evolve Mineral: Nessa Area 2 vortex 
Hammer Geo: Nessa Area 3 vortex 
Ice Geo: Himuro vortex 
Plasma Geo: Ziba Area 3 vortex 
Thunder Geo: Ziba Area 2 vortex 
Wing Geo: Meido vortex