This page contains Mega Man Zero 4 Hints for GameBoy Advance called "Sub-Tank locations" and has been posted or updated on Mar 10, 2008 by cutiepiep24. Let us know what you think of this Hint by thumbs voting.
Make the weather sunny in Fenrir Lunaedge's stage. Then, go to the pit near the V.Claws. Use Z-Knuckle on the robot that holds a card key. Note: Do not attack an enemy with the key card because you will lose it. Insert the card key on the door with electric grills.
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