Once you reach Chapter 2 of the story, you'll be able to input passwords, allowing you to gain new items, among other things.

Password	Effect
27JXPFY2	Item - Accuracy Drink x1
CMJT1T3X	Item - Accuracy Drink x1
FY8SK6Y3	Item - Apple x20
QQWCNWJT	Item - Apple x20
95CPK75M	Item - Apple x20
XMN48Y3P	Item - Apple x20
0QTSCN2K	Item - Blast Wand x20
K8TXT13M	Item - Blast Wand x20
PCJXQR0J	Item - Confuse Wand x20
SH628N0C	Item - Confuse Wand x20
5H8TY3W8	Item - Guiding Wand x20
1TY1428Q	Item - Guiding Wand x20
HJR2K98N	Item - Iron Spike x20
QP6XR479	Item - Iron Spike x20
CK8PCCK7	Item - Iron Spike x20
Y128Y5MJ	Item - Iron Spike x20
SPH7CN0K	Item - Life Seed x2
MJN3QP64	Item - Life Seed x2
43NXY28S	Item - Max Elixir x20
SNTY92JQ	Item - Max Elixir x20
W8N3WJPK	Item - Max Elixir x20
JN2K90P9	Item - Max Elixir x20
K0JY410J	Item - Oran Berry x20
R1125P92	Item - Oran Berry x20
F27960FT	Item - Oran Berry x20
N0FSK8SH	Item - Oran Berry x20
62F0JMHF	Item - Petrify Wand x20
43SJNSH8	Item - Petrify Wand x20
QQXR6T1T	Item - Power Drink x1
N13QQNWJ	Item - Power Drink x1
7997FTWJ	Item - PP Up Drink x1
QSR61SFT	Item - PP Up Drink x1
0MR3WK8W	Item - Reviver Seed x5
SQNWHH5P	Item - Reviver Seed x5
R8XY9612	Item - Reviver Seed x5
K0PFY8XX	Item - Reviver Seed x5
CCMPJY97	Item - Reviver Seed x5
1TWH7647	Item - Reviver Seed x5
5R43MPF4	Item - Reviver Seed x5
1TTW7H99	Item - Reviver Seed x5
8Y948QXN	Item - Reviver Seed x5
2JR641XM	Item - Reviver Seed x5
FTXSQR6S	Item - Sitrus Berry x2
HH61T296	Item - Sitrus Berry x2
R28XPJWK	Item - Slumber Wand x20
F26SNY47	Item - Slumber Wand x20
F3XPF447	New Dungeon
R3XSR96T	New Dungeon
8W6Y41TS	New Dungeon
SR2CF3W6	TM - Aerial Ace x1
P6XSP6W5	TM - Aerial Ace x1
5PCMQP79	TM - Bulldoze x1
R8NW9962	TM - Bulldoze x1
499947H5	TM - Charge Beam x1
QR1TXSH5	TM - Charge Beam x1
NSP5R448	TM - Cut x1
T13P8TT2	TM - Cut x1
JSQQXSHF	TM - Dragon Claw x1
SCCP6Y5P	TM - Dragon Claw x1
K96XY642	TM - Echoed Voice x1
7JMMQQXQ	TM - Echoed Voice x1
MMJN147C	TM - Energy Ball x1
P8P6SPH9	TM - Energy Ball x1
K760PF3S	TM - Facade x1
WK6Y493X	TM - Facade x1
95R8T3MF	TM - Flame Charge x1
47K91SCK	TM - Flame Charge x1
2963QMNT	TM - Grass Knot x1
3W6296TT	TM - Grass Knot x1
R2CJT13Q	TM - Gyro Ball x1
NSJXXSMC	TM - Gyro Ball x1
P8QXT47C	TM - Hidden Power x1
P6Y91Y8P	TM - Hidden Power x1
MF0MK8MR	TM - Low Sweep x1
JN0R6Y1Y	TM - Low Sweep x1
60CJP98T	TM - Poison Jab x1
XT0R0P8Q	TM - Poison Jab x1
T48N3QY0	TM - Power-Up Punch
5JSQW8NX	TM - Power-Up Punch x1
QSN0QTT3	TM - Rock Slide x1
SF12K96Y	TM - Rock Slide x1
98Y2612C	TM - Rock Tomb x1
3NWCPH6T	TM - Rock Tomb x1
F1XN445M	TM - Round x1
7JMCJY2F	TM - Round x1
R5QY97JX	TM - Scald x1
R93MNY3Q	TM - Scald x1
QPF10K8P	TM - Secret Power x1
0P8XY92H	TM - Secret Power x1
25N48QR2	TM - Shadow Claw x1
T3P7JTY3	TM - Shadow Claw x1
QNXP6T11	TM - Smack Down x1
5QQY6Y3Y	TM - Strength x1
78PK5PHC	TM - Strength x1
8SQSN0CH	TM - Swords Dance x1
XXTXY2F3	TM - Swords Dance x1
HCPJY929	TM - Thunder x1
Y8PJT0R3	TM - Thunder x1
MFSK6Y7H	TM - Thunderbolt x1
6Y2H9478	TM - Thunderbolt x1
JY3WH646	TM - Waterfall x1
62JP9449	TM - Waterfall x1