Mega Man Battle Network 3 Blue Cheats

After you complete the Secret Area by defeating Serenade, use the 10-bug bug Trader 30 times, trading in a total of 300 bugs. Then leave the secret area, (leave the internet and go back in). When your return to the Bug Trader, Bass will appear, fused with Gospel, and attack you. If you defeat him, you will get the Bass chip.

After obtaining all three Tomes in the "Legendary Tomes" job, don't head back to the Ghost Navi just yet. Instead, go to the strange-looking statue in the teacher's lounge at ACDC school. Examine the statue to find 300,000 Zenny.