Blizzard Buffalo - Parasitic Bomb
Toxic Seahorse - Frost Shield
Tunnel Rhino - Acid Burs
Volt Catfish - Tornado Fang
Crush Crawfish -Triad Thunder
Neon Tiger - Spinning Blade
Gravity Beetle - Ray Splasher
Blast Hornet - Gravity Well
Bit - Ice Shield -Frost Shield charged up-
Byte - Tornado Fang
Vile - Spinning Blade
Godkarmachine O Inary - Parasitic Bomb
Press Disposer - Tornado Fang
Vile MK-2 (If you did not defeat him earlier in the game - Parasitic Bomb & Tornado Fang (Machine Body) Vile himself Spinning Blade
Volt Kuragiel - Triad Thunder
Dr.Doppler - Acid Burst
Sigma V 1 - Spinning Blade
Sigma V 2 - X - Buster (no maverick weapon works) Z - Sabre (If you have it)
Collect all of the heart tanks, sub tanks, ride armors, and regular Dr. Light upgrades. Don't go into any of the pink capsules.
In the first stage of Doppler's lab, make your way to the area where spiked balls fall from the ceiling. Slide down the left side of the first pit with full health and go into the capsule that's on the other side of the fake wall you'll find.
This upgrade provides you with the abilities of all four of the chips (normally, you can only get one per file), but it can't be saved via password.
Defeat Vile with Ray Splasher or Spinning Blades before Doppler's lab appears. In the second stage of the lab, switch to Zero before you enter the room that contains the giant mosquito mechaniloid.
When it's destroyed, Zero will be seriously injured and give X the Z-Saber. This is the most powerful weapon as it can destroy any boss with two shots. It can be saved with a password but be warned; getting the Z-Saber means sacrificing Zero. You won't be able to play as him and he won't appear in the ending.
1741 5232 3441 2486 - Blast Hornet defeated
3668 4884 3851 4221 - Blast Hornet and Blizzard Buffalo defeated
3661 4888 3851 2227 - Blast Hornet, Blizzard Buffalo, and Gravity Beetle defeated
3661 4884 3351 2227 - Blast Hornet, Blizzard Buffalo, Gravity Beetle, and Toxic Seahorse defeated
1778 5232 3541 6488 - Blast Hornet, Blizzard Buffalo, Gravity Beetle, Toxic Seahorse, and Volt Catfish defeated
3661 4884 3321 8227 - Blast Hornet, Blizzard Buffalo, Gravity Beetle, Toxic Seahorse, Volt Catfish, and Crush Crawfish defeated
3661 4888 3327 8221 - Blast Hornet, Blizzard Buffalo, Gravity Beetle, Toxic Seahorse, Volt Catfish, Crush Crawfish, and Tunnel Rhino defeated
3661 4864 3327 8221 - Dr.Doppler's lab part 1
7671 2854 3287 6241 - Dr.Doppler's lab part 2
5768 1261 3627 8456 - Dr.Doppler's lab part 3
3661 4864 3327 8221 - Dr.Doppler's lab part 4