Crossover Battle mode:
Note: This trick requires two Game Boy Advance Wireless Adapters and another Game Boy
Advance with Boktai 2. When the game is powered on, attach the Wireless Adapter before the
title screen appears. A "Crossover Battle Mode" option will now appear below the
"Continue" option at the starting menu. You can play against the Boktai 2 player to see
who can defeat Shade Man faster.
Alternate saved game icons:
Complete one of the following tasks to replace the standard saved game icon.
Dark Complete icon: Collect all Dark Chips
Forte's Icon icon: Defeat Forte SP in Nebula Hole Area 6
Gigi Complete icon: Collect all Giga Chips
Mega Complete icon: Collect all Mega Chips
P.A. Complete icon: Use all Program Advances
Protoman's Icon icon: Defeat Neubla Gray.
Stand Complete icon: Collect all Standard Chips
Chip variations:
After getting the corresponding chip, use one of the following combos using it in a battle
to vary its attack.
Gyroman/SP/DS bombs on one enemy: Hold L + R.
Z-Saber extra slash: Press Left + B.