Pokémon: X (Mega Man X)
Type: Steel
Ability: Protean
Moves: Charge Shot*, Sketch
Signature Move: Charge Shot- Base 90 Power, 15 PP, Steel-type, Special. No Special Effects. Can only be used by Armorless X. Steelium Z turns it into 175BP Corkscrew Crash.
Stats: 80 HP/70 Atk/70 Def/100 SpA/80 SpD/100 Spe (BST: 500)
Reasoning: Mega Man X (Although he just goes by X) is the titular and main character of the Mega Man X series. As Dr. Light's magnum opus, he was gifted the ability to think and feel, and act upon these, essentially becoming the world's first fully sentient robot. He was sealed away for 30 years to test his morality as Dr. Light would not live long enough to properly ensure that X was ready to be released to the world. He later helped create the Reploid race, and became a Maverick Hunter to stop the Mavericks (basically Reploid criminals) who started cropping up after a while, and continously battling the leader of the Mavericks, Sigma, who just won't stay dead, for whatever reason.
In the games, X in his base form is usually depicted as very weak, but his Variable Weapons System affords him the move Sketch which... yeah. X's movepool is unparalleled. It's a shame, then, that his stats are subpar, with not a single stat reaching above base 100. What he DOES have however is both his incredible movepool and access to Protean, which, as Greninja has previously taught many players, is an amazing ability. It's by this ability that X lives and dies... at first, at least. The Charge Shot is X's signature move, based on his ability to charge his X-Buster in every Mega Man X game.
When I said 'at first' for saying X lives and dies by Protean, there's a reason for that. You see, X, throughout his games, collects various sets of armor which improve his abilities. And of course, that translates perfectly to forme changes! And there are A LOT of form changes I'm covering (To note: SIX of them!), since I'm using every armor set that X has used from X4 to X6! All but two give up the Protean Ability for a new ability and typing, with more specialized stats for a given role to use with X's incredible versatility. So with that out of the way, let's dive right into...
Forme Changes
X's Forme Changes are performed out of battle using the Dr. Light Capsule Key Item.
Form: Fourth Armor X [X-Fourth] (Mega Man X4-X5)
Changes
Base Stats: 100 HP/80 Atk/90 Def/110 SpA/100 SpD/110 Spe (BST: 590)
Ability stays as Protean.
Typing remains unchanged.
New Move: Plasma Charge Shot- Steel-type, Base 95 Power, 100 Accuracy, 15 PP, Special. Traps the target for 1 turn, dealing 1/8 of their maximum HP at the end of the turn. Can only be used by Fourth Armor X and Ultimate Armor X. Steelium Z turns it into 180BP Corkscrew Crash.
New Z-Move: Giga Attack: Nova Strike 4th- Upgraded from Plasma Charge Shot using 4Xium Z. Steel-type, Base 200 Power, Physical. Calculated from X's higher attacking stat.
Reasoning: Fourth Armor X is a slight stat boost from Armorless X, representing how in X4 and X5, Fourth Armor X is a straight upgrade from Armorless X and the last truly upgrade-based armor rather than armors that specialise in different areas. The Plasma Charge Shot is the more iconic of Fourth Armor X's two charge shots (He can swap between two arm parts at will), and the Nova Strike is Fourth Armor X's Giga Attack, which translates well into a Z-Move, and in that game it is a flying charge forwards which makes X invulnerable for the length of the charge (But this functionality is removed to avoid balance issues). There is, however, a reason why it's called Nova Strike 4th, rather than just Nova Strike, though...
Next we have...
Form: Falcon Armor X [X-Falcon] (Mega Man X5-X6)
Base Stats: 90 HP/70 Atk/80 Def/110 SpA/90 SpD/130 Spe (BST: 560)
New Typing: Steel/Flying
New Ability: Free Move- User is immune to all entry hazards and clears any hazards on your side of the field when switched in.
New Move: Spear Charge Shot- Base 70 Power, 90 Accuracy, Steel-type, 15 PP, Special. +1 Priority. Ignores target's Stat Boosts. Can only be used by Falcon Armor X. Steelium Z turns it into 165 BP Corkscrew Crash.
New Z-Move: Giga Attack: Giga Crush- Upgraded from Spear Charge Shot with FalconXium Z Base 210 Power, Steel-Type, Special. Calculated from X's higher attack stat. Hits both enemies in a Double Battle.
Reasoning: The name of the game with Falcon Armor X is revenge killing and hazard clearing. Falcon Armor X enjoys greater speed than any other form of X, and he still gets more bulk and power from donning this armor, albeit not as much bulk as the Fourth Armor. He sacrifices Protean for Free Move, the name of the unique flight function which the Falcon Armor gives. This allows X to clear out Entry Hazards upon switching in and leaves him completely unaffected by Stealth Rock. His Signature Move, Spear Charge Shot, is weaker than any other Charge Shot type (even Armorless X's!), but in turn it's able to pierce through obstacles to get the jump on enemies who X would otherwise struggle with, hence the stat boost ignorance and increased Priority. Giga Crush is the Falcon Armor's Giga Attack, which acts as a screen clear in the original games. Hazards won't be doing much with Falcon Armor X around.
Third is:
Form: Gaea Armor X [X-Gaea] (Mega Man X5)
Base Stats: 110 HP/50 Atk/110 Def/110 SpA/110 SpD/50 Spe (BST: 540)
Typing remains unchanged.
New Ability: Prism Armor
New Move: Gaea Charge Shot- Base 100 Power, 95 Accuracy, 15 PP, Steel-type, Special. Reduces the target's Special Attack by 1 stage. Can only be used by Gaea Armor X. Steelium Z turns it into 185 BP Corkscrew Crash.
New Z-Move: Giga Attack- Gaea Burst- Upgraded from Gaea Charge Shot with GaeaXium Z. Steel-Type, Special, Base 160 power. Traps the target for 3 turns, dealing 1/6 of their max health as damage at the end of each turn.
Reasoning: Gaea Armor X is the second-tankiest armor of X's, even being immune to the dreaded spikes which would otherwise instantly kill X. This shows in the fact that X's Gaea Armor has much better bulk than X's previous two armors plus Prism Armor, but this comes at a cost: X loses A LOT of speed and mobility for this, and while his Gaea Charge Shot IS the strongest Charge Shot of ANY of X's Armors and its Shot-erasing properties manifest as a guaranteed Special Attack Debuff, his Speed drops a massive 50 points, dropping him right into the Dead Zone: He's too fast to use in Trick Room, but too slow to be used out of it. His Z-Move is based on the armor's Giga Attack in Mega Man X5, where he creates a large sphere of energy which traps the enemy within, dealing severe amounts of damage.
Our fourth X Form is...
Form: Blade Armor X [X-Blade]
Base Stats: 100 HP/110 Atk/100 Def/80 SpA/90 SpD/110 Spe (BST: 590)
New Ability: Tough Claws
New Typing: Steel/Fighting
New Move: Charged Saber- Steel-type, Base 95 Power, 100 Accuracy, 15 PP, Physical. High Critical Hit Rate. Makes contact. Can only be used by Blade Armor X. Steelium Z turns it into 180BP Corkscrew Crash.
New Z-Move: Giga Attack: Dual Saber Wave- Upgraded from Charged Saber with BladeXium Z. Base 100 Power, 100 Accuracy, Physical. Does not make contact. Hits twice. High Critical Hit Rate.
Reasoning: Blade Armor X's stats may look familiar and that's because Blade Armor X is just a physical-oriented version of Fourth Armor X, except with an added Fighting-type to better make usage of Tough Claws. Basically use him as you would Fourth Armor X, except on the physical side. The reason he's got Tough Claws is because this armor focuses on usage of the Z-Saber.
Two more forms to go! Next up is...
Form: Shadow Armor X [X-Shadow]
Base Stats: 80 HP/90 Atk/80 Def/70 SpA/90 SpD/125 Spe (BST: 535)
New Ability: Prankster
New Typing: Steel/Dark
New Move: Engetsurin- Steel-type, Base 90 Power, 100 Accuracy, 15 PP, Physical. Raises X's Defense and Special Defense by 1 stage. Can only be used by Shadow Armor X. Steelium Z turns it into 175 BP Corkscrew Crash.
New Z-Move: Giga Attack: Enkourin- Upgraded from Engetsurin with ShadowXium Z. Steel-type, Status. X protects himself, avoiding all moves that target him. Any foe who tries to attack X while he is protecting himself will lose 2/3 of their current HP.
Reasoning: Shadow Armor X is Blade Armor X's weaker but trickier cousin, focusing more on beating foes in a war of attrition rather than straight-up overpowering them. Engetsurin is Shadow Armor X's charge shot (and it creates a field around X which damages foes and erases projectiles, which manifests as a defense boost), and Enkourin is the Giga attack, which creates two spinning blades that orbit X, stopping projectiles and severely damaging anybody who is close to X.
Lastly...
WARNING! WARNING! THIS FINAL FORME IS LIKELY UBER-TIER MATERIAL! TAKE IT INTO ACCOUNT AT YOUR OWN RISK!
Form: Ultimate Armor X [X-Ultimate]
Base Stats: 120 HP/120 Atk/120 Def/120 SpA/120 SpD/120 Spe (BST: 720)
Typing remains unchanged.
Ability remains unchanged.
New Moves: Plasma Charge Shot, Nova Strike
Signature Move: Nova Strike- Base 120 Power, Steel, 10 PP, Physical. Calculated using X's higher attack stat. Cannot miss. Makes contact. Can only be used by Ultimate Armor X. Steelium Z turns it into 210 BP Corkscrew Crash.
Reasoning: Take everything good about the other formes of X. The speed of the Falcon and Shadow Armors. The Gaea Armor's tankiness. The balanced nature of the Fourth Armor and of course, Protean, and throw them all into a blender. Sure it's, slightly outclassed in a few areas, like the Falcon Armor and Shadow Armor being a bit faster and the Blade Armor having Tough Claws, but Ultimate Armor X is THE strongest X Form, and for good reason. It is meant to break the game, just as it does in its original sources in X4, X5 and X6, where it is only obtainable through a secret capsule (X5 only) or a cheat code. Using the Ultimate Armor, X can spam the Nova Strike Giga Attack, hence why Ultimate Armor X's Nova Strike is not a Z-Move but a regular move, and the Ultimate Armor also retains the Fourth Armor's Plasma Charge Shot, too, if you want to use that, but the Nova Strike is just better. There is a very good reason why this armor is named the Ultimate Armor. He can fulfill just about any role you can think of.
Here are some sample sets for Ultimate Armor X.
O, O, 6 Left, L1, R2, Web Spider (Physical All-Out Attacker Ultimate Armor X)
X-Ultimate@Life Orb
Nature: Adamant or Jolly
Ability: Protean
-Nova Strike
-Filler
-Filler
-Filler
Filler= Any physical move you can think of. Examples include Sacred Fire, Icicle Crash, Brave Bird, Extreme Speed, Precipice Blades, Petal Blizzard, Bolt Strike, Poison Jab, and so on.
Cursor X, 2 Up, 9 Down (Special Setup Sweeper Ultimate Armor X)
X-Ultimate@Power Herb/Leftovers
Nature: Timid or Modest
Ability: Protean
-Nova Strike
-Set-Up Move
-Coverage
-Coverage
Set-up move=Quiver Dance/Geomancy/Shell Smash
Coverage= Any Special Move you can think of. Examples include Aeroblast/Hurricane, Origin Pulse/Scald, Techno Blast/Tri-Attack, Psychic/Psystrike, Fiery Dance/Blue Flare, Psychic/Psystrike, Spacial Rend, Focus Blast/Secret Sword, Dark Pulse, Moonblast/Light of Ruin, Ice Beam, Sludge Bomb, Power Gem and so on. The options are endless!