Mega Man 9 - Platform: Wii

Hornet Man stage: Unlimited screws:
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You will need the Jewel Satellite in order to do this trick. In the 
beggining of Hornet Man's stage, move to the right until you reach the 
first ladder. Without destroying the potted plant robots, activate the 
shield and stand on the second platform in between both the robots. If you 
remain standing there, the missiles will be destroyed and the screws will 
automatically land on Mega Man. This also increase your kill count for 
your achievements.

Rush Jet Adapter:
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Defeat five Robot Masters to get the Rush Jet Adapter from Roll and Auto.

Weapon recommendations:
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Use the following weapons to defeat the corresponding opponent. 

Galaxy Man: Use the Mega Buster. 
Jewel Man: Use the Black Hole Bomb. 
Plug Man: Use the Jewel Satellite. 
Tornado Man: Use the Plug Ball. 
Magma Man: Use the Tornado Blow. 
Hornet Man: Use the Magma Bazooka. 
Splash Woman: Use the Hornet Chaser. 
Concrete Man: Use the Laser Trident. 
Wall Shooters: Use the Mega Buster. 
Giant Machine: Use the Laser Trident. 
Blob Monster: Use the Black Hole Bomb. 
Dr. Wily part 1: Use the Mega Buster. 
Dr. Wily part 2: Use the Mega Buster. 
Dr. Wily part 3: Use the Plug Ball. 

Try the following Boss order and recommended weapon. 

Splash Woman: Use the Mega Buster. 
Concrete Man: Use the Lightning Trident. 
Galaxy Man: Use the Cement Shot. 
Jewel Man: Use the Black Hole Bomb. 
Plug Man: Use the Jewel Satellite. 
Tornado Man: Use the Plasma Ball. 
Magma Man: Use the Tornado Blow. 
Hornet Man: Use the Magma Bazooka.