The Arkham Knight/Arkham Knight

The Arkham Knight is an unusual character, having six hits on both his combos, including a fully-ranged heavy combo. While both his specials deal reduced damage, he can initiate them with quick hits along with a passive to better his SP2 with more damage and Area Effect.

The Arkham Knight can be unlocked through his challenge. Otherwise, copies can also be randomly obtained though the Arkham Pack, but this will not unlock him for direct promotion.

Note that he is sorted by name under "T" instead of "A", putting him after Superman and before The Flash.

Strategy
The Arkham Knight is usually outfitted to take advantage of one or both basic attack patterns, but he can be used with a focus on either of his special attacks, for he can often generate as much power as is needed with a single combo and/or with aid from his gear and teammates.

Basic Attacks
His combo ender is vulnerable (i.e. it is possible for you to use a special while being hit by it, even if you are not blocking). The Arkham Knight can nevertheless wield Ra's Al Ghul's Scimitar and/or the Gauntlets of Azrael well, as, operating off 9% of his damage as a base and applying effects unrelated to damage over three hits, his combo-ender is definitely in the top percentage of combo enders.

His heavy basic combo is fully ranged. It can always hit targets who are not in melee distance. While it is not possible to keep shooting to keep them away as you will move up to your target after one combo, this is very good for getting some free hits in retaliation after being knocked back and makes it almost impossible to chain basic combos against him with knock-back combo characters. However, on offense, since you can only hit one basic attack each time against a blocking opponent and his heavy attacks have a slow starting animation, he gets interrupted easily if in melee range. When fighting against him, ranged specials can also take advantage of his slow starting animations to catch him off-guard after knocking him back.

His full light and heavy combos do 66.7% and 83.3% more damage respectively than characters with the same damage stat but ordinary basic combos (e.g. Bane/Arkham Origins). For some perspective, his heavy combos do the damage a character with ~2000 base damage would do if they had normal basic combos.

Much like Harley Quinn/Arkham Knight, The Arkham Knight can generate over one bar of power with a single basic combo if some additional power generation is provided by gear and teammates. He is an even better character than her at doing so, however, as he has two 6-hit combos and can use one at range.

Special Attacks
The Arkham Knight's specials have fast starting animations, making them hard to block.

The drone's damage is part of his special 2, and will apply on special 2 effects such as power drain and crit from gear. In the case of crit, the Area Effect damage will also deal similarly increased damage. However, stun on special 2 from gear will be applied on the last normal hit, and the drone will continue firing at the target, essentially negating the stun.

Cloak of Destiny will boost the drone's damage, although the drone's natural damage is counted as reaching 200% of the counter, so it's damage would only be doubled at max (200% damage increase against stunned + 100% damage increase from reaching 200% = 400% total damage = 200% of reaching 200% damage).

Only the last hit of both of his specials can knock out a character. If his opponent is already at low health the first hits can only bring them to 1 health. The drone damage from his s2 is an exception; while Area Effect cannot knock out characters, it is possible for the normal last hit of his s2 to knock out a character, and then for the drone to keep firing at and possibly knock out the next character when they are forced to tag in as well. Also noted, if the normal hits of his s2 knocks out a character, upon the next character that tags in next and his drone start shooting, if the opponent has enough power to use their special(s), they can immediately start using their special right away, thus the drone will not deal any damage to that character, but will still deal Area Effect to the other character the opponent has left on their team. This strongly encourages him to use his special(s) on an enemy that have a large remaining health left.

Despite his passive describing "Achieving 180%" on his sp2, it is impossible to do so since his specials is a "Target"-type of special, thus the only way to use his passive is reaching 200% on it. Additionally, it has a large 200% area, larger than Deathstroke/Arkham Origins' s1. Interestingly enough, with Deadshot's target damage boost, hitting 199% on the meter will not activate Arkham Knight's passive, since his passive REQUIRES hitting MAX damage instead of 180% as stated.

Arkham teammates
. Arkham Knight characters DO work with Harley Quinn/Arkham, The Joker/Arkham Origins and Bane/Arkham Origins's Arkham teammate passives as per update 2.8.

Gear
Equipping him with the Gauntlets of Azrael and Ra's Al Ghul's Scimitar (especially the latter) is very beneficial, since he has a 3-hit combo ender, thus healing and power draining for more.

While the evolved unblockable chance of his gear is a low compared to most, it is compensated by the large amounts of hits on his basic combo (more hits equals more chance to break block and allow the remaining hits to be unblocked for AI defence; for players, combos are interrupted after the first hit) and its other two effects are perfect for such a basic-heavy character. For a strongly offensive build, it is entirely possible to use two more basic damage/crit chance gear on him for immense basic attack damage dealt with every combo.

Many players will focus only on his basic attacks because of how strong it is, if you want to utilize his passive, equipping him with power generation gears and/or CRIT on sp2 (e.g. Raven's Demonic Cloak) can allow him to constantly use his sp2 and deal heavy damage to the enemy's team, especially since he has 6-hit combos and generate power quickly. Ra's Al Ghul's Scimitar is also excellent here for its one bar of starting power.

Cloak of Destiny can be decent if he is teamed with a good stunning character like Static, as The Arkham Knight can utilize its damage boost on his full heavy combo without requiring power, and making it impossible to avoid or interrupt.

Good with

 * Superman/Red Son: A damage boost to his deadly combo can quickly decimate teams.
 * Deadshot: Due to his passive, Deadshot can give his teammates an "increased" sweet spot area and extra damage on target special(s) which can help Arkham Knight deal more damage on both of his Specials.

Good against

 * Characters with knock back combos, such as Batman and Doomsday.

Countered by

 * Raven/Prime: As only the last hits of his specials can knock out a character, he is likely to bring her to 1 health with the previous hits, allowing him to trigger her passive.
 * Black Adam: His lightning shield allows him to interrupt Arkham Knight's basic combos three times per tag in.
 * Batman/Dawn of Justice: His passive allows him to have chance of evading all specials, thus, can make Arkham Knight waste his special 2. However, since one of the Arkham Knight's other prominent feature is his strong basic attacks, he is still less affected by Batman's passive by most.
 * The Flash/Wally West Rebirth: Same reasons as stated above.
 * Superman/Injustice 2: Same reasons as stated above.

Abilities
Here are The Arkham Knight's abilities.

Support Cards and Gear
Here are The Arkham Knight's Support Cards and Gears.

Trivia

 * The Arkham Knight is the third mobile-exclusive character, after Darkseid and Static.
 * He is also the first to have a different aura color upon using his Super Move. He has a blue aura while Darkseid and Static have gold.
 * Chronologically, he's the second character  to lack a "Prime" version as he does not exist in the Injustice universe. His card is labeled "Arkham Knight The Arkham Knight", and the same applies for the original version of Scorpion (known as Mortal Kombat Scorpion), then followed by Deadshot. However, he was the first mobile-exclusive character to not be a prime card, and was followed by Deadshot.
 * The Arkham Knight is the first character to have a fully ranged combo. Some characters, such as Cyborg (third hit of heavy combo) and Harley Quinn/Animated (third and fourth hits of light combo), have part of their combos being ranged attacks.
 * One of his support cards, Red Hood, refers to his identity as Red Hood, in which he was resurrected after death by the Joker (in A Death in the Family), and taken up the Joker's old identity of the Red Hood as a way to "retaliate" against Bruce (Batman) for letting the Joker live after all these years.
 * His real name is Jason Todd, as is revealed near the end of the game Arkham Knight.
 * Lost For Words's card has Batman's icon at the top right corner instead of Arkham Knight's own icon.
 * The name of his Super Move is likely a reference to his first lines upon revealing his identity in Batman: Arkham Knight: "What's the matter? Lost for words?"
 * There is a glitch in the 2.6 update in which, if you have a spare Armor Plating card and go to sell/view it in Collection, it will incorrectly show that it gives all Batman characters 10% more damage.
 * The Arkham Knight is the only character to have their special 1 deal reduced maximum damage but does not inflict any status effect, after Red Lantern Hal Jordan's s1 was given a power drain effect.
 * He is the only character able to possibly knock out three characters with a single heavy combo.
 * He has the same base stats as Black Adam/Kahndaq.
 * If he uses his Super Move and another character immediately tags in and uses their Super, it is possible for his pistols to stay on the screen for the rest of the match even if he is tagged out.
 * Interestingly enough, the Minimum and Maximum Damage for his SP2 are the same!