Dragon Quest Heroes – Rocket Slime – Nintendo DS

Dragon Quest Heroes - Rocket Slime - Platform: Nintendo DS

Knightro Slime tank in Challenge mode:
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Go inside the church and press Y, L(2), Y, R(2), Y, Up, Down, Select 
to unlock the Knightro tank in Challenge mode.

The Nemesis Slime in Challenge mode:
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Go inside the church and press Y, R(2), Up, L(2), L, Y, Down(3), Y, 
Select to unlock The Nemesis tank in Challenge mode.

Schwarzen in Tank Masters mode:
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Defeat the final Boss. Then, go to where you defeated Slival on Mt. 
Krakatroda. Defeat Slival again to unlock Schwarzen in Tank Masters mode.

Giggles in Tank Masters mode:
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Successfully complete the game. Then, talk to "Meggan", the green Egg 
Slime in the northwest building of the central part of town.

Gott Schliemen in Tank Masters mode:
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Defeat the final Boss and rescue all 100 Slimes. Then, defeat Hooly and 
the Shogun in the last round of Tank Masters mode to unlock Gott 
Schliemen in Tank Masters mode.