Game Genie codes for FF1 Heal Potion out-of-battle effect:


Class (gfx don't change until you exit all menus)
AAVLISZA +
AAVUASZA

Max HP (up to 511)
GAVLISZE +
GAVUASZE

Max HP (include if going over 511; can't be used on a real NES due to 3-code limit)
IAVULSLE +
IANLASLE

Agi. (leader's Agility slightly reduces chance of ambush/increases preemptive attacks)
PPVLISZA +
PPVUASZA

Vit. (gain more HP on level-up)
LPVLISZA +
LPVUASZA

Luck (leader's Luck slightly reduces chance of ambush/increases preemptive attacks)
GPVLISZA +
GPVUASZA

Damage
AZVLISZA +
AZVUASZA

Hit %
PZVLISZA +
PZVUASZA

Absorb (wears off if you visit the Armor screen)
ZZVLISZA +
ZZVUASZA

Evade %
LZVLISZA +
LZVUASZA

Magic Defense (hidden)*
IZVLISZA +
IZVUASZA

Level (enemies run more often the higher the leader's Level)
TZVLISZA +
TZVUASZA


Quantity codes
(FF1 default) = 30
PAXLZUTP = 1
ZAXLZUTP = 2
IAXLZUTP = 5
ZAXLZUTO = 10
ZLXLZUTP = 50
GTXLZUTP = 100
NYXLZUTO = -1


*code to check MDEF:
PAKEXPAA +
PGKESPAA


<<<Misc. codes:>>>


Kill bats
XXEPPPXP + (talk to any bat to make it disappear. Add the second code
YIUPPYAA . to make bats go away for good {must leave the area first)

See dummied Prince GFX
TAXXXTAA + (changes Princess of Coneria's sister into a Prince instead.
POOLTIOP + This sprite cannot normally be seen in the game. Only the
TOOLYIYO . first code is needed; the others make him easier to see.)


<Chaos difficulty>

YAOAOYYE (Chaos has 4048 HP instead of 2000)
or
PPOAOYYE (Chaos has 6608 HP)
or
YZOAOYYA (Chaos has 10192 HP)

LUKPIZAU (Chaos casts XFER instead of CUR4)

PUKPYXYO (Chaos casts FADE instead of ICE2)


Black Mage changes colors during battle
ZAKZPAAA

Black Wizard changes colors during battle
ZAKZYAAA

See what's in a chest when inventory is full
NNOLIPEU +
PEOLTPXL +
ZEOLYPLZ

Cabin has same effect as Exit spell
AEXLIZAP + <-(actually already made by Paulygon)
XNXUGXYL +
EUXUIZSL

Enemies have a lower chance of inflicting status ailments
ZLVXXAGT

Enemies have a higher chance of inflicting status ailments
VPVXXAGT

Enemies have a very high chance of inflicting status ailments
NYVXXAGV