Go to the Figure Vending Machine in Access Tunnel E-1. Enter one of the following passwords at the special figure slot to get the corresponding prize:

Axl: 38184155
Axl (DNA changing pose): 91327856
Cinnamon: 92106548
Cinnamon (Iron Maiden): 19837556
Marino: 02098772
Marino (Quicksilver): 87352041
Massimo (Dymonion): 47722361
Megaman X: 73001472
Megaman X (victory pose): 44162918
X-Armor: 19690831
Zero: 29290141
Zero (Black): 72443102

Go to the North Square of Central Tower. Enter one of the following passwords at the special figure slot to get the corresponding prize:

Axl: 44527839
Axl (DNA changing pose): 46925056
Cinnamon: 10950508
Cinnamon (Iron Maiden): 31415926
Marino: 20040729
Marino (Quicksilver): 19780506
Massimo (Dymonion): 82536252
Megaman X: 19670801
Megaman X (victory pose): 78523511
X-Armor: 32603260
Zero: 33515937
Zero (Black): 69203600

First, get the Tianna Key for the the locked door in the Tianna Camp. Then, go to the locked door and open it. Inside you will fight a Boss that is accompanied by two Belladonnas. Defeat them, and after the fight break the red crystal to get X's Ultimate Armor Hyper Mode.

To get the Lagrano Ruins Key, you need to use the Deployment Center. Keep deploying your robots until they can find the key. After a few times, you will see it listed on the right-hand side of the screen when you check on the returned robots. After going through the door in Largano Ruins, you will find a secret item/force metal/weapon shop.

First, complete Chapter 8. Then, repeatedly deploy well-chosen units to the Melda Ore Plant in order to gain the Melda Key. Once you gain the key, go to the Melda Ore Plant and open the previously locked door (once you teleport there, go inside the plant and enter the locked door instead of entering the first elevator). Continue through the new area until you encounter a duck-like enemy. Defeat him and break the purple crystal behind him to gain the Absolute Zero Hyper mode. It should not be too difficult to defeat the enemy -- just continue to use X's and Zero's current Hyper Mode and Action Triggers and make sure you do not attack him with an element he is currently absorbing (a message will appear at the top of the screen whenever his absorbing element changes). Defeating this enemy is a lot easier than defeating the enemy which guards X's Second Hyper Mode.

Save the game before battling a Boss and go back to Hunter Base to refill your subtanks and LE. Use Analyzer to learn their weakness and you can inflict double damage. A recommended starting group is X, Cinnamon, and Zero or Marino, X, and Zero. Fire is weak against Water/Ice. Water/Ice is weak against Thunder. Thunder is weak against Fire.

Find a Preon Nurse in any unit. Destroy all enemies except the nurse. When the nurse is the last one remaining, steal its Reboot and Tank Energy 10. While you wait for its turn, keep using Zenny+ attacks on it. After the first turn of the nurse, it will say that it surrenders will use All Life 25 on your party. Then, destroy the nurse in order to get the Zenny bonus that you put on it before it attacks again. If you do not destroy it after it heals you, it will use an attack called "Then Thanks" and run away, giving you nothing.

Go to the Sky Room and look at the Giga Citizens poster. There will be a flag-like object that a Reploid is holding. In the top right-hand corner, you will see a small yet noticeable Proto Man head from the Megaman Battle Network series.

Buy 100 items: Tree Trunk Room sketch
Buy over forty main weapons: Nana sketch
Fight over 100 battles: Mouse Mech sketch
Fight over 500 battles: Yellow Scarf
Play for 25 hours: Force Metals sketch
Achieve over 100 critical hits: X ninja version sketch
Activate over 100 final strikes: Retro Mech figures
Save 50 times: Save Process sketch
Defeat over 100 Enigmas: Preon special figures
Defeat over 100 Mettaurs: Mettaur special figures
Defeat over 100 Preon-type enemies: Preon Army sketch
Defeat over 100 enemies: Preon special figures
Defeat over 500 enemies: Preon special 2 figures
Defeat over 1,000 enemies: Preon special 3 figures
Reach level 30 with X: Support Mecha sketch
Get 50 Force Metal recipes: Force Metal ore
Get over 100 critical strikes: X Ninja version sketch
Get over 150 consecutive hits: X's Armor sketch
Get over 10,000 experience points: Water Curtain sketch
Obtain over 50 Force Metal recipes: Force Metal Ore sketch
Spend over 100,000 Zenny: Teleport Device sketch
Gain over 100,000 experience points: Mini Mech figures
Use over 100,000 FME in the generator: Cinnamon's Secret sketch
MAX attack over 9,999: X's guns sketch
Play game for 10 hours: Justice sketch
Talk to pedestrians over 100 times: Swarming Armada sketch
Use Action Trigger over 100 times: X Flying version sketch
Deploy Mechaniloids over 50 times: Trajectory of Battle 2 music
Perform an attack with over 9,999 damage: Guns sketch
Complete deployment recovery: Hunter Base sketch
Complete figure sets 1 through 10: The Deadly Trio! sketch
Complete the game: Final Confrontation video
Collect all figure tokens: Glass Passageway sketch
Collect all sketches: Purple Scarf
Collect all ten posters: Proto Crab Mech sketch
Collect all field items: Mega Man sketch
Collect all background music files: Duckbill Mole sketch
Collect all video clips: Rafflesian sketch
Collect all Disc files: Dr. Psyche sketch
Collect all Mechaniloids: Giga City sketch

Rafflesian (joined by two Belldonnas)

Level: 77
LE: 31500
Power:115
Armor:75
Shield: 65
Speed: 70
Fire Damage: 100%
Water Damage: 100%
Thunder Damage: 100%
Rewards: 10,000 Zenny, 22,000 experience, 3,000 FME
Dropped items: Tank Parts (100%), Figure Token (100%), X's Ultimate Armor (in room)
Steal items: Build LE, Force Tomahawk (both 25%)
Note: Restores LE and grows a little in power each turn.
Location: Tianna Camp; requires Tianna Key from deployments.

Belldonnas

Level: 44
LE: 20500
Power: 115
Armor: 60
Shield: 60
Speed: 100
Rewards: 2,000 Zenny, 4,000 experience, 600 FME
Dropped items: Turbo Clock, Resist (both 100%)
Steal items: Force Missiles, Build Speed (both 25%)
Note: Restores LE every turn and grows in attack every time it is attacked.
Location: With Rafflesian

Duckbill Mole

Location: Melda Ore Plant; requires Melda Key from deployment.
Note: Zero's Extra Hyper mode is in the room.

Onetail

Location: Central Tower 999F shaft; requires Central Key obtained when Chapter 10 is completed.
Note: Restores about 10,000-20,000 LE each turn.

Twotails

Location: Room after Onetail
Note: There may be two of them. Element shifter; Analyzer and Force Metal recommended.

Threetails

Location: Room after Twotails.

Fourtails

Dropped items: Zero's Red Lotus Saber (his best weapon)
Location: Room after Threetails.
Note: Has extreme power and has the same defense as Scarface.

Fivetails

Location: Room after Fourtails, appears in a trio.
Note: Watch out for self-destruct.

Sixtails

Location: Room after Fivetails.
Note: Must be defeated before tenth turn, when he fully recovers.

Seventails

Location: Room after Sixtails.
Note: There are two of them. They recover LE every turn and get stronger every time they are attacked

Eighttails

Location: Room after Seventails.
Note: There are two of them, have full elemental attack range. When one is defeated the remaining one summons another. After defeating Eighttails, the next room is a special figure token room. Make sure you heal and save for the next battle.

Ninetails

LE:92500
Power:400
Armor: 90
Shield: 95
Speed: 140
Drops: DNA strand for Axl and his Ancient Gun weapon
Location: One or two rooms after Eighttails.
Note: Occasionally uses Regeneration to recover 25% of your party's health. Watch out for the Nine Fragments move, which hits nine times and does 699 to 999 LE damage with each hit. He also recovers over 10,000 LE each turn.

Wild Jango: Defeat him in the Central Tower Chapter 2.

Silver Horn: Defeat him in Tianna Camp Chapter 3.

Mad Nautilus: Defeat him in Gaudile's Lab Chapter 4.

Mach Jentra: Defeat him in Ulfat Factory Chapter 5.

Incentas: Defeat him in Gimiala Mine Chapter 6.

Depth Dragoon: Defeat him in Far East HQ Chapter 10.

Raflesian: Defeat her in Tianna camp by using Mechaniloids to get the Tianna key.

Ninetails: Defeat him in Central Tower once you have the Central Key. Note: To get the Central Key you must complete the game.