Raiden MKII: at title screen, hold down, then start, from left of [?], move and hold right into [?], then press A.
Judge Spear: at title screen, hold down, then start, from up of [?], move and hold down into [?], then press A.
Slave: (Note: This code can ONLY be used if the game setting is that you can choose the other two (made available) w/o a code). Goto any plane, hold joystick up or down, press start+A+B together.
After entering one of these codes, move to any plane, hold the joystick UP or DOWN, then press START+A+B.
To get bonus points at the tank boss, shoot at the thing shooting out red colored bullets quickly until it goes straight up disappearing itself until you go battle it later. If you shoot both of the things, you will get 100,000 points. A message will say "Destroyed at the same time"
When you arrive at the snow boss, shoot at the large part of the boss. If you were fast enough, you will get 50,000 points.
Shoot at enemies until you get icons that's worth 90 points. Get a drone icon. Shoot enemies until you get icons that are worth 900 points. Get another drone then repeat the process to 9,000 points.
To get the small drones, first start the game like you always do. In the "Select your Planes" screen highlight the plane you want. To get a small drone on the first player side, hold up or down depending if the plane is on the bottom or top row. Then press first player start button, the fire button and the bomb button together. If you get it the screen will have a question mark on it. To get the small drones on the second player side do the same thing but, press the second player start button.
To throw bombs farther, simply press and hold the bomb button for one second. Notice the bomb will travel to the top of the screen. The regular bomb only goes halfway up the screen.
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