Glitches in Mega Man Battle Network 3
From The Rockman EXE Zone Wiki
Japanese Versions Only
Regular Chip Glitch
When you remove Reg+5 Parts from the Navi Customizer and you do not have the require MB, your Regular Chip will be unselected. However if the Regular Chip was in Folder2, the chip will still be set as your Regular Chip despite lacking the required MB.
Higsby's Chip Order Error
There are certain chips Higsby sell that doesn't appear in the same code in your pack.
LavaStage J becomes LavaStage A in your Pack.
Jelly I becomes Jelly E in your Pack.
Still Kept in International Versions
11th Chip Glitch
This requires Custom+ Navi Customizer Parts and Custom Style. During battle, you can move your cursor to the right past your 10th chip and select an "11th Chip". This "11th Chip" will always be the 2nd chip in your Folder.