Editing Game:Ansem, Seeker of Darkness

  |COMbattlename=The 13th Struggle<ref>During the first battle in ''Kingdom Hearts Chain of Memories'' only. In ''Kingdom Hearts Re:Chain of Memories'', Revenge of Chaos is played instead.</ref>

  |DDDbattlename=L'Emineza Oscura I

On the 3DS version only, it was possible to stunlock Ansem by repeatedly using the Attack command right after a successful Reality Shift until his HP reaches 1, where then normally attacking him would finish him off. This strategy would fail if Ansem would immediatly get the Dark Figure to protect himself.

Ansem merges with the Dark Figure as he transports both himself and Riku to the [[The World That Never Was#Darkest End|Darkest End]] area. Ansem is now sealed inside a massive organic sphere with his Dark Figure attached to the top. Long-ranged commands are recommended in the case Ansem uses Dark Wave to back away, and as he will never use his Dark Rush attack if Riku is at a minimum of distance. Once More can make the use of Firaga Burst safe during potentially lethal mult-hit blows. The repetitive use of Balloonra can also deal a lot of damage to Ansem as well. Just like the previous fight, Ansem may respond with a taunt once his attacks succeed. When Ansem starts Dark Matter, Riku can use [[Firaga Burst]] (where the big fireball stays where it is) and once at the back, [[Ice Barrage]] to deal extra damage, but he must [[Lock-On]] for the ice command. Having [[Dark Roll]] equipped will help him move faster through the arena.

Once Riku is at the back of the arena, he can use [[Dark Splicer]], Dark Aura or [[Zantetsuken]], or the [[Ghost Drive]] [[Dual Style]], when he reaches the end of the pathway to warp right up to Ansem and deal damage. This is a risky tactic, as Riku can easily be captured by the Dark Web into the spheres of darkness, or get punched by Dark Rush.

In other cases, Riku needs to go back to Ansem by either rolling forwards, or using the walls on the sides. The Dark Laser attack can be deadly if Ansem uses it repeatedly. In order to avoid it, Riku should dodge aside the moment the Dark Figure's shots merge into the spheres. The Chaos Firaga attack can be dodged by rolling forward, but beware of Riku's Dream Eaters when they get afflicted by Confuse, as it makes them backstab him. If Riku gets any closer, Ansem uses the Dark Webs that will drag Riku into the spheres. Since they can't get Riku while in midair, he can use [[Flowmotion]] to evade this by staying airborne, as they last for quite a while; or use [[Firaga Burst]] with Doubleflight to stay in the air so he won't be able to drag Riku in. Then use Flowmotion with [[Sonic Impact]], if possible, to go back to the walls. Beware that if Riku hits the ground after falling, he might not be able to block immediatly and will be at the mercy of said Dark Webs. If Dark Barrier is equipped, Riku can also repeatedly use it to block the attack when close enough to Ansem, and use Counter Aura at the last moment each time. If Riku is too close though, Ansem might want to punch him using Dark Rush. Riku shouldn't stay on the sides of the arena and stay instead in the middle, as once Dark Matter is over, Riku may get caught off-guard and grabbed by the incoming moving spheres if he's in their way. Afterwards, press LR or L3 to return the Spirits back to Riku's position (two times if LR unlocks the target) so they will be able to help, but only once Dark Matter is over, as they may get caught by the Dark Webs, become unable to help, and sent backwards. In the case Riku gets caught by the Dark Webs or the spheres themselves, he will get immobilized in the sphere and struck by Planet Buster, but Planet Buster isn't a deadly attack and will end with Dark Matter, and Riku can safely heal afterwards, making this option of ending Dark Matter early viable if a Cure command is available.

If Riku deals a lot of consecutive damage, the [[Nightmare's End and Mirage Split|Mirage Split]] Reality Shift prompt can eventually appear. Dealing huge damage when close and stunning Ansem for a moment. Whenever he rallies, he will tend to use Dark Galaxy immediatly. In the 3DS version only, if Riku pounds him right away with the Attack command, Ansem will get stunlocked and Riku may unleash the same Attack combo over and over until Ansem's HP reaches 1. After some time, while hitting him again and again, the Reality Shift prompt can reappear, so Riku will be able to finish him off with it.

As soon as he has lost half of his HP (or two thirds on Critical Mode), Ansem starts using Dark Galaxy. It is potentially his most lethal move as the torrents of darkness appear randomly across the arena and may also hit Riku multiple times. One way to deal with it is to block the torrents and to keep dodge rolling backwards. Once Ansem finishes this part of the attack, he sends Riku flying across the pathway again. The black spheres can easily defeat Riku if he gets hit even once as the others may follow up for chained up damage. He must then either carefully dodge or block these. Riku shouldn't try sliding towards the wall as Flowmotion cannot be activated on them during this attack, but he can still use dodge roll along them with no fear of activating it and return to Ansem rapidly. However it isn't recommended to permanently dodge roll, because he may get hit if the timing is wrong, meaning he must dodge roll only when a sphere gets near him while keeping running back. One other alternative, where he should have [[Second Chance]]/[[Once More]] equipped in order to survive, is where he can use Dark Splicer just as the ball bombs reach him to go near Ansem and deal some damage, while staying at his position. Dark Splicer lasts long enough until the end of Dark Galaxy; therefore, there shouldn't be any risks for Riku to be knocked back, but he should immediately heal after this. Whenever Riku returns to Ansem, press LR or L3 to make the Spirits come back to him. After this, just repeat the cycle of pounding Ansem and running back to him and he'll go down.

|The Dark Figure fires six dark-charged projectiles that either circle around or rapidly aim at Riku, both curving and closing in on him if he is at least at medium range.

|△<ref>The waves may sometimes get past Riku's Block. The parry remains guaranteed with Dark Barrier.</ref>

|Hides in his core while the Dark Figure darkens the arena while it summons dark pillars randomly across the floor and pulls the opponents in front of Ansem. Afterwards it pulls them to the back of the arena and finishes by rolling several huge black spheres charged with lightning through the arena, with most moving forward on the left and right sides alternatively and some towards Riku, exploding upon impact.

|Only used during normal combat, and below half or two thirds (Critical Mode) of his HP. Reality Shift prompts cannot appear and Flowmotion cannot be used on the walls during this attack.

|Used once Riku is captured in a sphere. The sphere moves in front of Ansem, who has the Dark Figure release several dark projectiles into it which causes it to detonate. The explosion knocks the captured opponents back.   

|Used during Dark Matter and ends it. Riku is invulnerable to other attacks while captured. Ansem always taunts afterwards.