{{Infobox archetypearchseries| cut_from_names = true| image = WorldLegacyKey-CAMADU-EN-VG-artwork.png| caption = "[[Mekk-Knight Blue Sky]]", "[[Mekk-Knight Red Moon|Red Moon]]", and "[[Mekk-Knight Green Horizon|Green Horizon]]" cornering "[[Ib the World Chalice Priestess]]" in "[[World Legacy Key]]"| ja_name = ジャックナイツ| romaji = Jakkunaitsu| trans = Jack-Knights| fr_name = Mekk-Chevalier| es_name de_name = Mekk-CaballeroRitter| it_name = Meck-Cavaliere| ko_name = 잭나이츠|ko_romanized=Jangnaicheu|ko_trans=Jack-Knights| sc_name = 机界骑士| de_name pt_name = Mekk-RitterCavaleiro| it_name es_name = MeckMekk-CavaliereCaballero| sets =

Unlike the other members, "'''[[Mekk-Knightof the Morning Star]]" uses the kanji ''kikai-kishi''(機械騎士, lit. ", known as Machinery Knight") instead. ''Kikai''Jack-Knights(機械 "machinery") is a homophone of ''kikai''(機界, "machine world" (ジャックナイツ), substituting the kanji ''Jakkunaitsukai''(界, "world") in the [[OCG]], is an archetype largely comprised of [[LIGHT]] [[Psychic]] [[Monster Card|monsters]] (with [[Mekk-Knight Spectrum Supreme|one]] [[Cyberse]] as an exception) debuting in ''[[Extreme Force]]kai''. The archetype is both related to(械, and supported by, the "[[World Legacy]]contraption" archetype).

This archetype is related to the "The main seven [[World LegacyMain Deck]]" and Mekk-Knight" monsters take the form of robotic humanoid beings. Each "[[World Chalice]]Mekk-Knight" archetypespossesses star-shaped cores, as shown in along with glowing energy lines on their bodies, color-coded with the artwork colors of "the [[World Legacy Keywikipedia:Visible spectrum|visible spectrum]]" and "[[World Legacy Scars]]".

Each In the 'World Legacy' storyline, the cores of the "Mekk-Knights" were extracted by "[[Main DeckKnightmare Corruptor Iblee]] monster has a color of " to create the rainbow that appears in "[[Knightmare]]" monsters, with the artworks exception of "[[Mekk-Knight Spectrum SupremeBlue Sky]]" and . "Blue Sky" passed down its power onto "[[Auram the World Legacy PuppetChalice Blademaster]]"instead. {| class="wikitablesortable" style="text-align: center"

! Mekk-Knightmonster! Knightmare counterpart

| [[wikipediastyle="background-color:Red#F77" |Red]]

| [[wikipediastyle="background-color:Orange (colour)#FC7" |Orange]]

| [[wikipediastyle="background-color:Yellow#FF7" |Yellow]]

| [[wikipediastyle="background-color:Green#7F7" |Green]]

| [[wikipediastyle="background-color:Blue#7EF" |Blue]]| [[Mekk-Knight Blue Sky|Blue Sky]] / [[Mekk| -Knight Avram|Avram]]

| [[wikipediastyle="background-color:Indigo#58F" |Indigo]]

| [[wikipediastyle="background-color:Violet#C9F" |Violet]]

==Playing style==All The seven key Main Deck "Mekk-Knight" [[Effect Monster]]s share the following effect:* {{Quote|''"If 2 or more cards are in the same column, you can [[Special Summon ]] this card (from your hand) to in that column. You can only Special Summon "..." once per turn this way."'' }}Thus If the archetype relies on Special Summoning high level monsters while there are two or more cards opponent controls a card (such as when going second), this condition can be easily fulfilled by [[set]]ting a [[Spell]]/[[Trap]] in the same column as an opposing card. However, against an empty board (such as when going first), fulfilling this condition becomes more difficult, but still possible. Methods include: * Perform a low-cost Extra Deck Summon (e.g. with "[[Instant Fusion]]", or by normal summoning a monster and linking it for "[[Salamangreat Almiraj]]") to swarm summon a monster in an Extra Monster Zone, and set a Spell/Trap in its column.* Special Summon a monster to the opponent's field (e.g. with "[[Knightmare Corruptor Iblee]]" or "[[Girsu, the Orcust Mekk-Knight]]"), and set a Spell/Trap in its column.On the field , each of the seven "Mekk-Knight" monsters have different effects. Some are more situational: "[[Mekk-Knight Red Moon|Red Moon]]" and generate "[[Mekk-Knight Yellow Star|Yellow Star]]" have situational card destruction effects, while "[[Mekk-Knight Orange Sunset|Orange Sunset]]" and "[[Mekk-Knight Green Horizon|Green Horizon]]" have situational swarming and recovery effects. The key "Mekk-Knight" monsters are "[[Mekk-Knight Purple Nightfall|Purple Nightfall]]", "[[Mekk-Knight Blue Sky|Blue Sky]]", and "[[Mekk-Knight Indigo Eclipse|Indigo Eclipse]]".* "Purple Nightfall" is a "Mekk-Knight" [[search]]er; it temporarily [[banish]]es a "Mekk-Knight" monster (typically itself) as a [[Quick Effect]] to search out another one.* "Blue Sky" is also a "Mekk-Knight" searcher; it searches upon being Summoned from the hand advantage, the number searched out being equal to the number of opposing cards in its column (i. e. a maximum of 3 at once).* "Indigo Eclipse" has a Quick Effect to move a "Mekk-Knight" to another column; it can be used to make space to Special Summon more "Mekk-KnightsKnight" has monsters, and, if either "[[World Legacy Key]]", "[[World Legacy's Secret|Secret]]" or "[[World Legacy Whispers|Whispers]]" is active, can disrupt the opponent's plays by moving a Kozmo Town"Mekk-like recovery method in Knight" to the form same column as opposing cards.In terms of supportive Spell/Traps, the archetype's specific support Spell/Traps are all "[[World Legacy ]]" cards, tying the archetype to the greater "World Legacy" series and their own support (e.g. "[[Lib the World KeyBlademaster]]"). The Field Spell * "[[World Legacy's Memory]]" is very a powerful against Extra consistency tool that can Special Summon any "Mekk-Knight" monster from the hand or Deck reliant Decksin either player's turn, but will return the summoned monster to the hand in the [[End Phase]], and locks the player into only summoning "Mekk-Knight" monsters for the turn; "Memory" is typically used to summon "Purple Nightfall" on the opponent's turn, who would then banish itself for a search, alleviating the negative effects of "Memory".* "[[World Legacy Scars]]" is the Deck's [[Field Spell]], providing situational stat buffs and card cycling, and a costly but otherwise fares poorly against ''devastating'' effect to completely empty the opponent's hand ''and'' [[Extra Deck (]], by banishing 8 different "Mekk-Knight" monsters from the face-up field or GY. It is usually only played in dedicated decks focusing on activating its second effect as quickly as possible.* "[[World Legacy Key]]", "[[World Legacy's Secret|Secret]]" and "[[World Legacy Whispers|Whispers]]" are [[Continuous Spell]]/[[Continuous Trap|Traps]] that serve as the archetype's primary disruption tools. While on the field, each of them continuously negates a specific type of card's effect that the opponent resolves in the same column as a friendly "Mekk-Knight" monster: "Key" negates Traps, "Secret" negates monsters, and "Whispers" negates Spells. As mentioned, "Indigo Eclipse" can move "Mekk-Knight" monsters as a Quick Effect, allowing it to reactively negate opposing cards alongside these three cards. If the player occupies all five columns with "Mekk-Knight" monsters, then the opponent will be effectively shut out of using a specific type of card. "[[Girsu, the Orcust Mekk-Knight]]" is a unique "Mekk-Knight" monster that can be [[Normal Summon]]ed without [[Tribute]]s, can send a "World Legacy" card to the [[GY]], and can Special Summon a [[Token]] to the opponent's side of the field, which helps facilitate the conditions for "Mekk-Knight" Special Summons.<!--Link monster overview here--> Naturally, as they are related, splashing in other "World Legacy" cards could provide an extra boost to the Deck variants) ; "[[World Legacy - "World Armor"]]" can help out by searching Spells and Traps, as well as provide [[material]] for additional Summons when combined with "[[Lib the World Key Blademaster]]" after being [[mill]]ed by "Girsu", as "Lib" can then revive it with no Extra Deck "[[World Legacy Succession]]". "[[Knightmare Corruptor Iblee]]" is also a good choice as it can bring back any of your used Link Monsters for more mileage as well as help set-up the Special Summon effects of most "Mekk-Knight" monsters such . It can also be used as Kozmomaterial for "[[Linguriboh]]". Due to the archetype being comprised largely of Psychic monsters, Monarch"[[PSY-Framelord Lambda]]" may also help as it can allow for more disruption as well as search a strong card like "[[PSY-Framegear Gamma]]" due to a monster like "Purple Nightfall". "[[Galatea, BLSthe Orcust Automaton]]" can help recycle banished copies of "Girsu", Nekroz"Morning Star", or True Draco and is resource-intensive""World Armor"", on top of allowing one to use "[[Dingirsu, the Orcust of the Evening Star]]" as a solid form of protection.

=== Recommended Cards cards===

* [[Dawn Girsu, the Orcust Mekk-Knight]]* [[Doctor CraniumKnightmare Corruptor Iblee]]* [[Electronic Transimulation WattkinesisRescue Rabbit]]* [[Ghost ShipSangan]]* [[Grinder GolemWorld Legacy - "World Armor"]]* [[Hushed Psychic ClericTherion "Duke" Yul]]* [[Kaiser Sea HorsePsychic Processor]]* [[Lightray Grepher]]|tuner monsters = * [[Magical MerchantGhost Ogre & Snow Rabbit]]* [[Silent Psychic Wizard]]|synchro monsters =* [[World Legacy - "World Shield"Borreload Savage Dragon]]

* [[Number 42: Galaxy TomahawkDingirsu, the Orcust of the Evening Star]]

|spells =* [[Lib the World Legacy KeyBlademaster]]* [[World Legacy ScarsHip Hoshiningen]]* [[Defense ZoneSaryuja Skull Dread]]* [[D.D.R. - Different Dimension Reincarnation]]|normal spells =* [[Column SwitchWorld Legacy Succession]]

|equip spells =* [[D.D.R. - Different Dimension Reincarnation]]|field spells =* [[World Legacy Scars]]|continuous spells = * [[World Legacy Key]]|quick-play spells =* [[World Legacy's Memory]]|normal traps =* [[World Legacy Trap Globe]]|continuous traps =

===Official Decklist==={{Decklist|Konami's "Mekk-Knight" Deck<ref>{{cite web | url = https://ygorganization.com/cosmiccompassisthefutureofourchildren/| title = <nowiki>[Deck Recipe] Konami's Example "Jack Knight" Deck Recipe</nowiki> | author = NeoArkadia | website = The Organization | date = October 5, 2017 | accessdate = May 12, 2021}}</ref>

 ===Weaknesses===* Cards that prevents the player from Special Summoning can hurt the Deck's capability to swarm. Examples include the "[[Vanity's]]" series, "[[Archlord Kristya]]", "[[Heat WaveEvilswarm Ophion]]", etc.* Minimizing the amount of cards placed on the field can reduce the number of active columns that a "[[Ally of Justice Catastor]]Mekk-Knight" can instantly destroy this archetype's monsters since they are all LIGHT monstersbe Summoned to.* Floodgates such as "[[Lose 1 Turn]]" make the "Mekk-KnightsKnight" archetype more vulnerable to destruction.