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Game Boy

Metroid II - Return of Samus

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Game Genie

Infinite Missiles

CODE
Effect

Infinite Missiles

Source : Libretro
Game Genie

Infinite Energy

CODE
Effect

Infinite Energy

Source : Libretro
Game Genie

At The Very Start Of The Game, You Start With The Bombs, Spider Ball, Space Jump, High Jump Boots, And Screw Attack

CODE
Effect

At The Very Start Of The Game, You Start With The Bombs, Spider Ball, Space Jump, High Jump Boots, And Screw Attack

Source : Libretro
Game Genie

Start With About 165 Missiles

CODE
Effect

Start With About 165 Missiles

Source : Libretro
Game Genie

Energy From Enemies Gives You 99 Life, If You Don't Have An Energy Tank

CODE
Effect

Energy From Enemies Gives You 99 Life, If You Don't Have An Energy Tank

Source : Libretro
Game Genie

Energy Tanks, Missile Tanks, And Stuff Like Spider Ball And Ice Beam, Come Back When You Leave The Screen. Makes Metroid's Come Back Too

CODE
Effect

Energy Tanks, Missile Tanks, And Stuff Like Spider Ball And Ice Beam, Come Back When You Leave The Screen. Makes Metroid's Come Back Too

Source : Libretro
Game Genie

Debug Mode

CODE
Effect

Debug Mode

Source : Libretro
Game Genie

Don't Load Font When Resuming Saved Game

CODE
Effect

Don't Load Font When Resuming Saved Game

Source : Libretro
Memory code

Beam Modifier

CODE
Effect

Beam Modifier

Source : Libretro
Memory code

Debug Mode

CODE
Effect

Debug Mode

Source : Libretro
Memory code

Extra Stuff

CODE
Effect

Extra Stuff

Source : Libretro
Memory code

Rapid-fire Controls

CODE
Effect

Rapid-fire Controls

Source : Libretro
Memory code

Number Of Energy Tanks

CODE
Effect

Number Of Energy Tanks

Source : Libretro
Memory code

Infinite Missles

CODE
Effect

Infinite Missles

Source : Libretro
Memory code

Invincibility

CODE
Effect

Invincibility

Source : Libretro
Memory code

No Enemies

CODE
Effect

No Enemies

Source : Libretro
Memory code

Have Items Modifier

CODE
Effect

Have Items Modifier

Source : Libretro
Memory code

Infinite Missiles

CODE
Effect

Infinite Missiles

Source : Libretro
Memory code

Infinite Life

CODE
Effect

Infinite Life

Source : Libretro
Memory code

Infinite Energy Tanks

CODE
Effect

Infinite Energy Tanks

Source : Libretro
Memory code

Moon Jump [Turn Off Switch To Come Down]

CODE
Effect

Moon Jump [Turn Off Switch To Come Down]

Source : Libretro
Memory code

Enable Debug Mode

CODE
Effect

Enable Debug Mode

Source : Libretro
Memory code

Invincibility Against Enemies

CODE
Effect

Invincibility Against Enemies

Source : Libretro
Memory code

Jump In Midair

CODE
Effect

Jump In Midair

Source : Libretro
Memory code

Hit Anywhere

CODE
Effect

Hit Anywhere

Source : Libretro
Memory code

Start With Bombs, Spider Ball, Space Jump, High Jump Boots, And Screw Attack

CODE
Effect

Start With Bombs, Spider Ball, Space Jump, High Jump Boots, And Screw Attack

Source : Libretro
Memory code

Start With About 165 Missiles

CODE
Effect

Start With About 165 Missiles

Source : Libretro
Memory code

Energy From Enemies Gives You 99 Life

CODE
Effect

Energy From Enemies Gives You 99 Life

Source : Libretro
Memory code

Energy Tanks, Missile Tanks, And Stuff Like Spider Ball And Ice Beam, Come Back When You Leave The Screen.

CODE
Effect

Energy Tanks, Missile Tanks, And Stuff Like Spider Ball And Ice Beam, Come Back When You Leave The Screen.

Source : Libretro
Memory code

Infinite Missiles (Variation)

CODE
Effect

Infinite Missiles (Variation)

Source : Libretro
Memory code

Have All Items

CODE
Effect

Have All Items

Source : Libretro
Memory code

Moon Jump

CODE
Effect

Moon Jump

Source : Libretro
Memory code

Number Of Full Energy Tanks

CODE
Effect

Number Of Full Energy Tanks

Source : Libretro
Memory code

Time Modifier (Minutes)

CODE
Effect

Time Modifier (Minutes)

Source : Libretro
Memory code

Time Modifier (Hours)

CODE
Effect

Time Modifier (Hours)

Source : Libretro
Memory code

Enemies Look Frozen, Backwards, And/Or Upside Down

CODE
Effect

Enemies Look Frozen, Backwards, And/Or Upside Down

Source : Libretro
Memory code

Enemies Use The Wrong Graphics

CODE
Effect

Enemies Use The Wrong Graphics

Source : Libretro
Memory code

Small Enemy (And Item) Graphics

CODE
Effect

Small Enemy (And Item) Graphics

Source : Libretro
Memory code

Enemies Are Invisible (But Can Still Hurt You)

CODE
Effect

Enemies Are Invisible (But Can Still Hurt You)

Source : Libretro
Memory code

Enemies Are Invincible (Except For Metroids)

CODE
Effect

Enemies Are Invincible (Except For Metroids)

Source : Libretro
Memory code

Enemies Frozen In Place And Invincible

CODE
Effect

Enemies Frozen In Place And Invincible

Source : Libretro
Memory code

No Music

CODE
Effect

No Music

Source : Libretro
Memory code

Music Remix (Some Instruments Don't Play)

CODE
Effect

Music Remix (Some Instruments Don't Play)

Source : Libretro
Memory code

Extremely Slow/Ambient Music

CODE
Effect

Extremely Slow/Ambient Music

Source : Libretro
Memory code

Music Slowdown Remix [Graphics Messed Up]

CODE
Effect

Music Slowdown Remix [Graphics Messed Up]

Source : Libretro
Memory code

Music Remix [Samus Not Shown]

CODE
Effect

Music Remix [Samus Not Shown]

Source : Libretro
Memory code

Lava is Drained From All Areas

CODE
Effect

Lava is Drained From All Areas

Source : Libretro
Memory code

Bomb Time Modifier

Effect

Bomb Time Modifier

Source : Libretro
Memory code

Disable Beep When Low On Health

CODE
Effect

Disable Beep When Low On Health

Source : Libretro
Memory code

Enemies Always Drop Energy/Missile Refills

CODE
Effect

Enemies Always Drop Energy/Missile Refills

Source : Libretro
Memory code

Title screen music modifier

Effect

Title screen music modifier

Source : Libretro
Memory code

Bomb time detonation is half

Effect

Bomb time detonation is half

Source : Libretro
Memory code

Jump to enter cling ball

Effect

Jump to enter cling ball

Source : Libretro
Memory code

Enable Debug Menu

Effect

Enable Debug Menu

Source : Libretro
Memory code

Jump for Summersault

Effect

Jump for Summersault

Source : Libretro
Memory code

Jump Camera position

Effect

Jump Camera position

Source : Libretro
Memory code

Alternate jump camera

Effect

Alternate jump camera

Source : Libretro
Memory code

Garbage at top of screen when jumping

Effect

Garbage at top of screen when jumping

Source : Libretro
Memory code

Fall through everything

Effect

Fall through everything

Source : Libretro
Memory code

Jump as high as you want

Effect

Jump as high as you want

Source : Libretro
Memory code

Pause to see GAME CLEARED message

Effect

Pause to see GAME CLEARED message

Source : Libretro
Memory code

Pause to see the ending

Effect

Pause to see the ending

Source : Libretro
Memory code

Faster jump movement

Effect

Faster jump movement

Source : Libretro
Memory code

Faster morph ball speed

Effect

Faster morph ball speed

Source : Libretro
Memory code

Always Drop Item Modifier

CODE
Effect

Always Drop Item Modifier

Source : Libretro

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