Codes & Tips

Anti-Sukamon
If your Digimon's dirt gauge fills up completely, it will digivolve into Sukamon, a rather unpleasant companion, it must be said.
To get rid of it, go visit the Sukamon King. He can be found at the dump north of Gear Savanna. He will gladly restore your Digimon to its original appearance.

Easy Money
In Freezeland, on the ice floe, there are three Mojyamon who want to trade with you. The one at the bottom left is particularly interesting as he can help you earn a lot of Money easily.
Start by buying as many "HP Disk M" as possible at 500 Bits each from the capital. Then trade them to the Mojyamon for the same number of "S Defense ROMs". Sell those back for 2,000 Bits each, making a substantial profit.
You can repeat this technique as many times as you like, as long as you haven't traded three different items with that particular Mojyamon.

For each code, replace ** with the desired value.

Change your Age (no more than 18):
8013FC46 00**

Infinite Money:
8013C268 FFFF

Maximum Defense:
8016CA0E 03E8

Empty dirt gauge:
8013FC22 0000

Maximum MP:
8016CA20 270F
or
8016CA1E 270F

Maximum HP:
8016CA20 270F
or
8016CA1C 270F

Final Attack:
80144DFE 35FF

Maximum Life:
8016CA50 0003

Set Items:
80144C20 00**

All techniques:
3016ca2c 00ff
3016ca2e 00ff
3016ca2f 00ff
3016ca30 00ff

Infinite item in 1st slot:
8013FCAC 00A2
or
80344C36 0002

Maximum Discipline:
8013FC2C 0064

Maximum Intelligence:
8016CA12 03E7

Maximum Attack:
8016CA0C 03E7

Maximum Speed:
8016CA10 03E7

Digimon Weight:
8013FC46 00**

Action Replay code source: http://www.digimonworld.ht.st/

You will only find these codes on my site, as I feel the others reduce the game's lifespan too much.