Open Battle in Mega Man Battle Chip Challenge
From The Rockman EXE Zone Wiki
Open Battles are side battle marathons not related to the story mode. This mode is where any remainder Navi Chip that weren’t dropped in the story can be obtained.
In Open Battles fights divisible by 5 are fixed while the rest are chosen randomly from a pool of foes.
- DenCity Open Battle
- Length: 10 Battles
- Yumland Open Battle
- Length: 20 Battles
- Netopia Open Battle
- Length: 30 Battles
- HackersN Open Battle
- Length: 100 Battles