| romaji = Tūn(monsutā)
| japanese translated =
| english = 1st and 3rd format: Toon (monster)<br/>2nd format: Toon (Monster) | french = 1st and 3rd format: (monstre) Toon<br/>2nd format: (Monstre) Toon
| german = Toon(-Monster)
| italian = (mostro) Toon<br/>Formerly: (Mostro) Toon
| korean = 툰 (몬스터) ''Tun (Monseuteo)''
| spanish = 1st and 3rd format: (monstruo) Toon<br/>2nd format: (Monstruo) Toon|portuguese=(monstro) Toon<br/>Formerly: (Monstro) Toon
}}
{{Infobox/Archetype/Yu-Gi-Oh!
Originally, in the manga and anime, Toon monsters were formed by having the effect of "[[Toon World (manga)|Toon World]]" applied to non-Toon monsters. These Toon monsters had the ability to avoid being destroyed in battle.
In the ''[[OCG]]'' and ''[[TCG]]'', Toon is an [[ability]]. Toon monsters exist as separate cards than their non-Toon counterpart, with whom they share no direct in-game relationship. They are capable of attacking the opponent directly and while they benefit from the card "[[Toon World]]", they can be used without it. There are [[#OCG/TCG|five classes]] of "Toon monsters", dubbed by fans Class A, B, C, D, and E.
All Toon monsters belong to the "[[Toon]]" archetype (including "[[Manga Ryu-Ran]]", since its Japanese name contains トゥーン).
Toon monsters were the first Effect Monsters with an ability to be introduced, debuting in ''[[Spell Ruler]]''. While [[Flip monster]]s (as Flip Effect Monsters) were introduced earlier, they were not treated as having an ability until much later.
Toon monsters can also be [[Special Summon Monster]]s.
==Classes of Toon monster==
===''OCG''/''TCG''===
====Class A====
* Cannot be [[Normal Summon]]ed/[[Set]].
* Must first [[Special Summon]] itself from the [[hand]], by [[Tribute|Tributing]] the same number of monsters as for a [[Tribute Summon]] of a monster with its original Level (the number is specified in its card text), while you control "[[Toon World]]".
** After being Special Summoned properly, it can be Special Summoned from the [[Graveyard]] or while [[banish]]ed by any appropriate effect (it is not necessary to control "Toon World").
* Cannot [[attack]] the [[turn]] it is Special Summoned.
* Requires payment of 500 [[LP]] to attack.
* If "Toon World" on the field is [[destroy]]ed, so is the Toon monster.
* If the opponent doesn't [[control]] any Toon monsters, it can [[Direct attack|attack directly]]. Otherwise, it must [[attack target|target]] a Toon monster for its attacks.
Class A Toons: "[[Blue-Eyes Toon Dragon]]", "[[Toon Summoned Skull]]" (''OCG'' only), "[[Manga Ryu-Ran]]" (''OCG'' only), "[[Toon Mermaid]]" (''OCG'' only)
====Class B====
* Cannot be [[Normal Summon]]ed/[[Set]].
* Must first [[Special Summon]] itself from the [[hand]], by [[Tribute|Tributing]] the same number of monsters as for a [[Tribute Summon]] of a monster with its original Level (the number is specified in its card text), while you control "[[Toon World]]".
** After being Special Summoned properly, it can be Special Summoned from the [[Graveyard]] or while [[banish]]ed by any appropriate effect (it is not necessary to control "Toon World").
* If "Toon World" on the field is [[destroy]]ed, so is the Toon monster.
* Can [[attack]] the [[turn]] it is Summoned.
* If the opponent doesn't [[control]] any Toon monsters, it can [[Direct attack|attack directly]]. Otherwise, it must [[attack target|target]] a Toon monster for its attacks.
Class B Toons: "[[Toon Dark Magician Girl]]"
====Class C====
* Can be [[Normal Summon]]ed/[[Set]].
* Cannot [[Special Summon]] itself from the [[hand]].
* Cannot [[attack]] the [[turn]] it is Summoned.
* If "[[Toon World]]" on the field is [[destroy]]ed, so is the Toon monster.
* If the player controls "Toon World" and the opponent doesn't [[control]] any Toon monsters, it can [[Direct attack|attack directly]].
Class C Toons: "[[Toon Cannon Soldier]]", "[[Toon Gemini Elf]]", "[[Toon Goblin Attack Force]]", "[[Toon Masked Sorcerer]]".
====Class D====
* Can be [[Normal Summon]]ed/[[Set]].
* Cannot Special Summon itself from the [[hand]] (unless due to the base card's effect).
* Cannot [[attack]] the [[turn]] it is [[Summon]]ed.
* Nothing happens to the Toon monster if "[[Toon World]]" is [[destroy]]ed.
* If the player controls "Toon World" and the opponent doesn't [[control]] any Toon monsters, it can [[Direct attack|attack directly]].
Class D Toons: "[[Toon Ancient Gear Golem]]", "[[Toon Barrel Dragon]]", "[[Toon Buster Blader]]", "[[Toon Cyber Dragon]]", "[[Red-Eyes Toon Dragon]]", "[[Toon Dark Magician]]".
====Class E====
* Cannot be [[Normal Summon]]ed/[[Set]].
* Requires "[[Toon World]]" to be on the [[field]] to be [[Special Summon]]ed (even if it has already been correctly Summoned).
* Must first Special Summon itself from the [[hand]] by [[Tribute|Tributing]] the same number of monsters as for a [[Tribute Summon]] of a monster with its current Level.
* Cannot [[attack]] the [[turn]] it is Special Summoned.
* Requires payment of 500 [[LP]] to attack.
* If "[[Toon World]]" is [[destroy]]ed, so is the Toon monster.
* If your opponent [[control]]s no Toon monsters, it can [[Direct attack|attack directly]]. Otherwise, it must [[attack target|target]] a Toon monster for its attacks.
Class E Toons: "[[Toon Summoned Skull]]" (''TCG'' only), "[[Manga Ryu-Ran]]" (''TCG'' only), "[[Toon Mermaid]]" (''TCG'' only)
===Manga===
