When you complete the game under the normal difficulty setting the Hard difficulty setting will become available. If you complete and save the game with both Vent and Aile under at least the Normal difficulty setting and then start a new game with the cleared game file you will retain Model X after getting Model ZX.
Enter the arcade in Area C next to Transerver. Then defeat any two Bosses to unlock the Crusher-F arcade machine for gameplay. To unlock the Mega Crusher-F machine get over 100 points on the Crusher-F machine.
Boss Plushies When you beat a Boss with a Level 4 victory the Plushies can be found in the background of the Prarie's room. To achieve a level 4 victory you must defeat the boss without hitting where their Biometal is located. Unlock the following Plushies by completing the corresponding task.
Unlock Hivolt Plushie: Defeat Hivolt while avoiding to hit his wings
Unlock Lurerre Plushie: Defeat Luererre while avoiding to hit her head
Unlock Protectos Plushie: Beat Protectos while avoiding to hit his chest
Unlock Fistleo Plushie: Defeat Fistleo while avoiding to hit his head
Unlock Flammole Plushie: Defeat Flammole while avoiding to hit his arms
Unlock Hurricaune Plushie: Defeat Hurricaunce while avoiding to hit her neck
Unlock Leganchor Plushie: Defeat Leganchor while avoiding to hit his head
Unlock Purprill Plushie: Beat Purprill while avoiding to hit his arms.
Unlock Arcade Mini-Games To activate the arcade games next to the transerver in Area C-2 you must complete certain tasks within the game. When the corresponding task for the game has been done press 'Up' next to the lit screen to play.
Unlock Crusher-F: Defeat any two bosses
Unlock Mega Crusher-F: Beat the high score on Crusher-F (100 points)