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    Boss FAQ by cvxfreak

    Version: 2.0 | Updated: 10/01/11 | Printable Version | Search This Guide

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                              - B O S S   F A Q -      
    
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                        Resident Evil Zero / Biohazard 0
             Covers the Nintendo GameCube and Nintendo Wii Consoles
                             A Boss FAQ by cvxfreak
                        Copyright 2001-2011 by cvxfreak
                                  Version 2.0
                                October 1, 2011
                         Email: cvxguides[at]gmail.com
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    Table of Contents
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    1.  Introduction and Version History
    2.  Boss #1: Giant Scorpian
    3.  Boss #2: Giant Centipede
    4.  Boss #3: Giant Bat
    5.  Boss #4: Proto Tyrant
    6.  Boss #5: Proto Tyrant (2)
    7.  Boss #6: Marcus Queen
    8.  Boss #7: Marcus Queen (2)
    9.  Boss #8: Marcus Queen (3)
    10. About The Author
    11. Conclusion
    
    
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    1. Introduction and Version History
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    This isn't a full walkthrough for Resident Evil Zero (known as
    Biohazard 0 in Japan). Rather, it is only a Boss FAQ. This FAQ is
    filled with detailed strategies for beating the various bosses found in
    Resident Evil Zero. If you need walkthrough help, please seek out one
    of the various detailed walkthroughs available on the internet such as
    on GameFAQs.com. I have also written a complete FAQ/Walkthrough for
    Resident Evil Zero (and other Resident Evil games), which can be found
    on the aforementioned website.
    
    
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    2. Boss #1: Giant Scorpian
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    Boss #1:    Stinger (Giant Scorpion)
    Character:  Billy or Rebecca
    Difficulty: Moderate
    Location:   Train Bar
    
    This is the first boss fight of the game, and it's quite basic in
    its execution. You are cornered by the Stinger, so run up to the back
    wall with the door and begin shooting with the HUNTING GUN. Use up any
    all SHOTGUN AMMO you may have against the creature before switching to
    the HANDGUN and continuing from there. The Stinger is not a difficult
    boss, but it does cause a lot of damage and is a bit difficult to
    avoid. Having at least one full-powered recovery item and enough
    ammo will ensure a victory through attrition. Basically, keep shooting
    and healing and eventually, the Stinger will die. When the Stinger
    spasms towards death, try to stay away from it as it will lunch its
    pincers for one final counterattack, which is highly damaging. If you
    happen to be playing as Rebecca, be careful as this can possibly get
    her killed.
    
    
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    3. Boss #2: Centurion
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    Boss #2:    Centurion
    Character:  Billy
    Difficulty: Easy
    Location:   Animal Storeroom
    
    Rebecca will be held by this creature, so she won't be able to help out
    in this boss fight. That said, the room is big enough and Billy should
    have enough powerful weapons that this boss fight should be rather
    simple. Arm Billy with the HUNTING GUN, get somewhat, but not too far
    away from the creature, and then begin shooting it. It's easy to run
    away if the Giant Centipede tries to get close to Billy. Be careful, as
    the boss gradually deals damage to Rebecca, which could eventually kill
    her, so do not take too long or try to leave the room. After perhaps 15
    to 20 SHOTGUN SHELLS, or twice the amount of regular HANDGUN BULLETS,
    the Giant Centipede should die, and Rebecca will be freed. If you have
    the GRENADE LAUNCHER with you already, then the fight will be over
    even quicker.
    
    
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    4. Boss #3: Giant Bat
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    Boss #3:    Giant Bat
    Character:  Billy
    Difficulty: Medium
    Location:   The Church
    
    It is preferred you have Billy fight the battle. He has more stamina, 
    and can aim a gun more accurately than his female counterpart. Equip
    a powerful gun, such as the SHOTGUN, aim upward and then shoot the 
    Giant Bat. The SHOTGUN'S widespread ammo offer a greater chance of
    actually hitting the giant bat and the smaller bats flying around the
    room. The frustrating part of this battle is that when aiming, you must
    be quick to shoot, or else Billy has a chance of missing and thus
    wasting ammo. Also, this boss fight is a bit frustrating because the 
    Giant Bat is hard to see with the pre-rendered camera angles (beauty has 
    its consequences). Try to stay in one place, such as near where the
    altar is, where you can hopefully see the bat, and then shoot it as it
    flies into view. The GRENADE LAUNCHER is also a powerful weapon for
    this fight, but the range and speed of the weapon are not ideal for 
    this boss, although the GRENADE LAUNCHER does deal a great amount of
    damage to the Giant Bat if you can actually hit it. Very often the bat
    will swoop down and hit Billy (or Rebecca). These hits are actually
    powerful, so ensure that whomever you are controlling has a decent
    amount of recovery items, particularly Rebecca. 
    
    
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    5. Boss #4: Proto-Tyrant
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    Boss #4:    Proto-Tyrant
    Character:  Rebecca
    Difficulty: Medium
    Location:   Birkin Laboratory
    
    Rebecca's alone and without Billy's assistance, but as long as she has
    the MAGNUM, which she should have found in the cable car, she can take
    this boss out with few issues. Have Rebecca shoot the Proto-Tyrant
    after it introduces itself, but keep her far away from it in any
    direction. Watch out for its swiping attacks, which can be fatal if the
    Pro. Rebecca might run out of MAGNUM ammo if her shots are not direct 
    enough, but a weapon as weak as the Handgun or SHOTGUN can definitely
    finish the job. However, the GRENADE LAUNCHER with ACID ROUNDS is 
    recommended as a backup as Tyrants, true to series forum, always fall
    to ACID ROUNDS faster than other weapons. Just keep Rebecca away from
    the Proto-Tyrant, shoot it with powerful ammunition, and you should be
    fine. The Proto-Tyrant will collapse to the ground once it has been
    defeated.
    
    
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    6. Boss #5: Proto Tyrant (2)
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    Boss #5:    Proto-Tyrant
    Character:  Rebecca, Billy
    Difficulty: Easy
    Location:   Lower Boiler Room (Second)
    
    This is the first time in the game both characters are able to battle
    a boss at the same time. The Proto-Tyrant is back for a rematch, but
    with twice the characters and weaponry, this battle should be a breeze.
    The room is quite narrow, so once the boss fight begins, run away from
    the Proto-Tyrant, turn around and then shoot it as it approaches. That
    is all there is to this battle, actually, being a repeat battle of
    sorts. As long as you possess powerful ammo and have both characters
    attack, the Proto-Tyrant does not stand a chance. Be sure to avoid
    its claw-based swipe attacks, which do plenty of damage, especially to
    Rebecca. As with the previous battle, once the Proto-Tyrant collapses
    to the ground, the battle is over.
    
    
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    7. Boss #6: Queen Leech
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    Boss #6:    Queen Leech, Part One
    Character:  Rebecca, Billy
    Difficulty: Medium
    Location:   Battle Room
    
    This boss is not very difficult, thanks to the presence of both
    Rebecca and Billy and the ability to use the generous amount of space
    in the room to avoid being directly attacked by the Queen Leech. The
    boss spews acid with reasonable trajectory and distance, but these
    attacks are nothing a simple GREEN HERB cannot heal. The powerful
    weapons will deal tremendous damage onto the Queen Leech, which will
    be somewhat slow to respond. Try not to let it get too close to either
    Rebecca or Billy, as if it does, the damage can be fatal. Overall,
    this is a relatively straightforward battle that requires little
    strategy other than shoot and dodge.
    
    
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    8. Boss #7: Marcus Queen (2)
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    Boss #7:    Queen Leech, Part Two
    Character:  Rebecca, Billy
    Difficulty: Easy
    Location:   Final Battle Room
    
    This is less of a boss battle and more of a gun shooting festival.
    Just spend a minute or two unloading any ammo you might have on the 
    evolved Queen Leech. Have Rebecca expend the MAGNUM's ammo because she 
    will not be needing a weapon after this battle. Other popular
    candidates for this battle are the SHOTGUN and GRENADE LAUNCHER because
    they deal plenty of damage and allow for the fight to end faster. 
    This boss is not difficult at all, but you should stay clear of its
    tackle and acid-spewing attacks. 
    
    
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    9. Boss #8: Marcus Queen (3)
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    Boss #8:    Queen Leech, Part Three
    Character:  Billy
    Difficulty: Medium-Hard
    Location:   Final Battle Room
    
    ---------------
    The First Valve
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    Rebecca will not be fighting in this boss fight, so it is all up to 
    Billy. Note that this boss fight differs from virtually every other
    boss fight in the series in that the enemy cannot be killed with pure
    strength alone. All that can be done to stop the enemy is to distract
    it by attacking it constantly and keeping it away from Rebecca. Run
    down from where Rebecca is and unleash the power of any weapon Billy
    might have (preferably the MAGNUM or SHOTGUN). Keep shooting so the
    Leech Queen becomes distracted, giving Rebecca the proper space to turn
    the valve. The Queen Leech will likely land a hit on Billy, so if that
    happens, button-mash the GameCube controller, Classic Controller or Wii
    Remote so he gets back up quickly. Keep shooting, and Rebecca should 
    eventually finish turning the valve. 
    
    
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    The Second Valve
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    Now, run to the left slightly and start shooting the Queen Leech again.
    Rebecca will run for the next valve, which will be whatever is out of
    range of the Queen Leech. Billy might already have run out of bullets
    for his most powerful weapon, but if he has the Custom Handgun, it
    will do the job in keeping the Queen Leech away from Rebecca. Do not
    worry about wasting bullets during this boss right. Just continue
    shooting the boss. If you distract the Queen Leech long enough, Rebecca
    should finish with the second valve. She will then automatically move on
    to the third one, which may be next to a set of stairs.
    
    
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    The Third Valve
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    Rebecca will probably climb up a set of steps, but even if she does
    not, it will not matter or change the result of the game. As Billy,
    continue the onslaught on the Queen Leech, avoiding its direct path and 
    continuing to protect Rebecca. Billy might be out of ammo by now, but if
    he is not, then just keep using whatever ammo he holds. If the Queen
    Leech gets too close to Rebecca, get close to the Queen Leech and fire at
    it with a long range weapon to distract the boss and hopefully get it to
    go after Billy instead. Rebecca should finish this third valve after a
    few moments.
    
    
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    The Fourth Valve
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    By now, your onslaught should slow the Queen Leech down somewhat, but
    if you still have ammunition left over, do not stop shooting. If
    Rebecca has a weapon in her inventory, take it from her now and
    continue shooting. Eventually, the boss battle will finally end when
    Rebecca completes turning the final valve.
    
    
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    10. About The Author
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    You can find me posting on NeoGAF (www.neogaf.com), GameFAQs and
    Biohaze, and Twitter (@cvxfreak).
    
    I have a GameFAQs contributor page, where you can find my other guides:
    
             http://gamefaqs.com/features/recognition/9035.html
    
    
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    11. Conclusion
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    This guide is complete and up-to-date to the best of my knowledge.
    
    I want to give the following special thanks:
    
    - My family and friends for their continued support
    - GameFAQs for being a great website after all these years
    - Capcom, for creating the Resident Evil series and Resident Evil Zero
    
    cvxfreak 
    cvxguides[at]gmail.com 
    
    This document is copyright 2011 by cvxfreak. Please respect this
    copyright.