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Special Robos
Successfully complete the Great Robo Cup. Then, complete one of the following tasks to unlock the corresponding Robo:
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King's Throne diorama
Reach 'King' rank, then talk to Lambda Halburn at Neobrain.
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Shrinking parts
At the end of the game, after purchasing the Pipit Robo, the Jameson Robo, and all Amun parts, equip the Amun parts to Jameson, then Pipit, then Jameson again. The Amun gun and Amun bomb parts will now have shrunk to the size of a normal gun, instead of giant.
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Sudden Death stage
Be victorious in the Robo Cup, then enter one of the laboratories on the upper floor of NeoBrain. Talk to the scientist facing the glass and defeat him to unlock the Sudden Death stage for purchase.
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Victory diorama
Reach 'King' rank, then talk to Lambda Halburn at Neobrain.
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The Underground stage
Be victorious in approximately twelve Grudge matches, then go in front of the clubhouse and defeat your shadow self to get illegal parts and the Dark Commander Mark. Then, talk to the suspicious man in the southwest house in the Bayside area to access a secret passage to The Underground.
