A good way to get a LOT of bits very quickly is to do the following steps.
1. Make sure you have a strong Champion or higher Digimon.
2. Wait for when the sun is out (Or anytime the ModokiBetamon or RedVegiemon are out in Native Forest)
3. Buy Bandages
4. Finally, go to the Native Forest area just to the west of Kunemon's Bed is (The place with the toilet) and fight the RedVegiemon nearest to Kunemon's Bed. He gives you 500 Bits every fight but as long as you consistently go back and forth and fight him, you'll be rich!
Added by: Ryuu_Ukigo Feb 6th 2009, ID#15476