Successfully complete the game and save it after the credits complete. Start a new game to being with the items obtained in your previous attempt.
Defeating Aztec Falcon
At the start of the game, your second Boss is Aztec Falcon (the first is the Boss that you fight and get the Z-saber). Before you talk to Jackson to save "your data", walk to the left. You will then be able to explore. Explore all the rooms and you will find some items. As you explore, try to find your way back to where you were fighting the first Boss. The purpose of this is to easily level-up your weapons. Do this until your Z-saber charges up. You will need that ability to defeat Aztec Falcon. After defeating that Boss, you will talk to the person that is held captive in the trash compactor and get a Thunder Chip. When you get this item, select it. It give your weapons a slight boost. It is not a one time thing, and can be kept afterwards. It paralyzes most enemies and causes more damage to Bosses.
Defeating X second form
Upgrade your Z-Saber skill to the fifth or sixth level to charge it faster. When fighting X second form, use the Ice Chip (obtained from one of your missions), charge your Z-Saber, climb any of the two vertical platforms, and jump-slash towards X's head. Be careful when jumping at X's head as you may hit X's hand.
Delete all enemies from a stage
First, use the Cyber Elf that turns all enemies into Metalls. After that, use the Cyber Elf that deletes all small enemies. Since all enemies are Metalls, they are considered small. The stage is now enemy free. Note: Make sure you use the two elves during a mission. Using them on the normal map would be pointless, since they all return once you turn off the game or complete a mission.
Easy Cyber Elves
At the start of the game, you can find a Cyber Elf hidden behind the wall in the back of the room you get resurrected in. You need the Z Saber to get it. Stand on top of the case and do a Jump Saber attack. The other Cyber Elf is in the Resistance Base. Answer "No" when Ceil asks you to help them. Then, take the elevator to the bottom floor and talk to the man who is laying down. Give him the Energy Crystals that he asks for. He will then stand up and you can get past him. There is a room a short distance past him. There is another jar in there that you must use the Jump Saber attack on.
Easy Energy Crystals
After defeating Phantom and saving the factory, return to the factory to get a large number of Energy Crystals, especially in the last room of the level. Note: You can only get them once.
Easy shield level up
When inside the resistance, you can always leave and visit past levels. Go up to the surface and move to the right until you get to the pillars that regenerate when they are completely destroyed. Stand next to the wall and charge your Shield Boomerang. Jump and throw your boomerang so that you hit the top section and let yourself fall to the ground. If done correctly, your Shield Boomerang should circle you forever, as long as you do not move. Allow the system to idle for about twenty minutes in this situation to get it to the maximum level.
Easy weapon level-up
After completing the introductory level where Zero gets his Sword and Pistol, get on the teleporter and teleport back to the base. Immediately exit the place by trying to climb the ladder you are in front of. Ciel will talk to you, and give you several options to select. Keep selecting the first choice she gives you on each option and you will be teleported to a junkyard level. In the middle of the level there will be these pillars that will keep growing back after each segment is destroyed. You can keep destroying the segments with the Sword and Pistol and they will level-up. Keep destroying the segments until the Sword and Pistol are at their maximum levels.
Hard mode
Successfully complete the game under the normal difficulty setting. Save the game after the credits. At the title screen, hold L and select "New Game". Zero's armor will have a different color. Also, you will no't be able to upgrade or charge any weapon except the Shield Boomerang.
Jackson
Successfully complete the game in hard mode with an "A" or "S" rank (collect all elves). Start a new game from this saved game to being with all elves including Jackson. Alternately, collect and power-up all cyber elves without using any of them under the normal difficulty setting.
Locked door
After you defeat the Golem and Ciel asks you to help them, answer "Yes". And after she asks you to do the Reploid Disposal Center mission, answer "No:. The door behind her will now be unlocked.
Skip credits
Hold A while the credits are displayed after completing the game at least once.
Skip opening sequence
To skip the screen where the logos pop out, press A + B + Start + Select.
Triple Rod pogo stick
When you get the Triple Rod, go to the Disposal Center either with the TRANCE or the elevator out of the Base. Continue along until you reach a location where there are ladders and platforms going up. At the top are two carriers and spiked balls. When you get to the bottom of the three ramps leading down, there will be a spiked column enemy. Jump so that you are directly above him, then hold Down + Attack. Your Triple Rod will come out and point down. Every time you touch the invincible top of the enemy, you will bounce. After about the first bounce, the enemy will begin to grow its destructible segments, sending you higher. Hold Jump, and you will bounce even higher. Go to the left while bouncing, and you will be on a wall. Jump up as far as possible. You will see a Cyber Elf container and an Energy Crystal. Use your Z-Saber aerial attack to slash open the container and the elf will drift toward you. If you have considerable skill, you should be able to get the crystal by using your Dash Wall-Jump to get up onto the ledge.
Ultimate mode
Unlock Jackson and start a game. Successfully complete the game using all elves. Hold R when starting a new game to play in ultimate mode.
