Chrono Trigger

Kill enemies with one hit:
E58B-F7A5

Kill one enemy to win the battle:
(NOTE: Only experience for the single enemy will be awarded.)
3365-5D00

Party and enemies disappear in battle:
DCB3-7765

Monsters change into other monsters during battles:
E1A5-7765

Unlimited use of item:
5682-F8D4

Walk through walls:
0B60-7FA4

Alternate code for "Walk through walls"
(This code should enables you to walkthrough closed doors):
39B0-EFA4

Screen shakes when area is entered:
5DE6-ED67

Speed bar never decreases:
5683-7765

Unlimited MP for person in first slot:
FDA6-7765

Unlimited MP during battles for person in first slot:
9DA6-7765

Unlimited MP for Frog:
7DA6-7765

Unlimited MP for Marle:
5DA6-7765

Unlimited MP for Ayla:
6DA6-7765

Unlimited MP for Crono:
3DA6-7765

Unlimited MP for Lucca:
9DAB-7765

Unlimited MP for Robo:
1DAB-7765

Unlimited MP for Magus:
2DAB-7765

Robo's techs take away all MP:
8DA8-7765

Attacks by party and enemies do less damage:
5527-EDD0

Attacks by party and enemies do more damage:
B623-7765

Most basic attacks miss:
B625-7765

Party and enemies are invincible:
B323-7765

Enemies can do no damage:
(Critical attacks do no damage, and everything else does 1 point of damage.)
EE23-7765

Non-magic attacks do less damage:
553D-5DD0

Magic attacks do more damage:
5537-8DD0

All enemies die instantly upon attack:
(The battle will not end.)
CD3B-7765

All enemies die with one hit and will die if they attack party:
(The party will also be healed after the battle.)
7838-7765

Party goes to level 99 after one battle:
(Ignore the experience display.)
A1EE-EFD9

Gain all techs:
22EC-ED60

All attributes at maximum for party:
65EB-E4A9

Altered music and sound effects:
DCCB-57FE

Start with a higher maximum HP:
EE6D-7F5D

Start with a higher maximum MP:
636D-745D

Start with maximum power:
BD6D-74ED

Start with maximum stamina:
BD6D-777D

Start with maximum speed:
BD6D-775D

Start with maximum magic:
BD6D-778D

Start with maximum hit ratio:
BD6D-77ED

Start with maximum evade:
BD6F-7D7D

Start with maximum magic defense:
BD6F-7D5D