diff --git a/src/Controller/EmojiController.php b/src/Controller/EmojiController.php
index c8a6b83..02c0434 100644
--- a/src/Controller/EmojiController.php
+++ b/src/Controller/EmojiController.php
@@ -2,12 +2,29 @@
 namespace App\Controller;
 
 use App\Entity\Emoji;
+use App\Entity\Rarity;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Annotation\Route;
+use App\Repository\RarityRepository;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use App\Repository\EmojiRepository;
 
+#[Route('/emoji', name: 'emoji')]
 class EmojiController extends AbstractController
 {
+    private RarityRepository $rarityRepository;
+    private HttpClientInterface $httpClient;
+
+    public function __construct(RarityRepository $rarityRepository, HttpClientInterface $httpClient)
+    {
+        $this->rarityRepository = $rarityRepository;
+        $this->httpClient = $httpClient;
+    }
+
     #[Route('/emoji', name: 'app_emoji')]
     public function index(): Response
     {
@@ -16,7 +33,114 @@ class EmojiController extends AbstractController
         ]);
     }
 
-    public function reproduceEmoji(Emoji $emoji1, Emoji $emoji2): Emoji {
-        return new Emoji();
+    private function getRarity(): Rarity {
+        $rarity = $this->rarityRepository->findAll();
+        $rand = mt_rand() / mt_getrandmax();
+
+        $sum = 0.0;
+        foreach($rarity as $r) {
+            $sum += $r->getDropRate();
+            if($sum > $rand) {
+                return $r;
+            }
+        }
+
+        return $rarity[0];
+    }
+
+    // Renvoi l'url de l'image issue de la fusion de deux emojis. Fonctionne avec un code et un emoji directement
+    private function getFusionUrl(string $emoji1, string $emoji2): string
+    {
+        $baseUrl = 'https://emojik.vercel.app/s/';
+        $size = 256;
+
+        // On encode les string pour l'url
+        $encodedEmoji1 = urlencode($emoji1);
+        $encodedEmoji2 = urlencode($emoji2);
+
+        return sprintf('%s%s_%s?size=%d', $baseUrl, $encodedEmoji1, $encodedEmoji2, $size);
+    }
+
+    #[Route('/fusion/{emoji1_id}/{emoji2_id}', name: 'fusion')]
+    public function reproduceEmoji(int $emoji1_id, int $emoji2_id, EntityManagerInterface $entityManager, EmojiRepository $emojiRepository): JsonResponse {
+        $emoji1 = $emojiRepository->find($emoji1_id);
+        $emoji2 = $emojiRepository->find($emoji2_id);
+
+        if (!$emoji1 || !$emoji2) {
+            return new JsonResponse(['error' => 'One or both emojis not found'], 404);
+        }
+
+        $child = new Emoji();
+
+        $child->setName("Testenfant");
+
+        // Chance de fusion
+        $fusionRand = mt_rand() / mt_getrandmax();   
+        if($fusionRand > 0.8) {
+            // Si les emoji parents sont des fusions on remonte l'arbre généalogique jusqu'à trouver un smiley normal
+            // On ne peut pas fusionner un smiley déjà fusionné 
+            $temp1 = $emoji1;
+            while(str_contains($temp1->getCode(), "vercel")) {
+                $temp1 = $temp1->getParent1();
+            }
+
+            $temp2 = $emoji2;
+            while(str_contains($temp2->getCode(), "vercel")) {
+                $temp2 = $temp2->getParent2();
+            }
+
+            $child->setCode($this->getFusionUrl($temp1->getCode(), $temp2->getCode()));
+        } else {
+            $rand = mt_rand() / mt_getrandmax();
+            if($rand > 0.5) {
+                $child->setCode($emoji1->getCode());
+            } else {
+                $child->setCode($emoji2->getCode());
+            }
+        }
+
+        // Lors d'une fusion un emoji récupère chaque stat d'un de ces deux parents de manière aléatoire
+        $rand = mt_rand() / mt_getrandmax();
+        if($rand > 0.5) {
+            $child->setStrength($emoji1->getStrength());
+        } else {
+            $child->setStrength($emoji2->getStrength());
+        }
+
+        $rand = mt_rand() / mt_getrandmax();
+        if($rand > 0.5) {
+            $child->setToughness($emoji1->getToughness());
+        } else {
+            $child->setToughness($emoji2->getToughness());
+        }
+
+        $rand = mt_rand() / mt_getrandmax();
+        if($rand > 0.5) {
+            $child->setIntelligence($emoji1->getIntelligence());
+        } else {
+            $child->setIntelligence($emoji2->getIntelligence());
+        }
+
+        $rand = mt_rand() / mt_getrandmax();
+        if($rand > 0.5) {
+            $child->setSpeed($emoji1->getSpeed());
+        } else {
+            $child->setSpeed($emoji2->getSpeed());
+        }
+
+        $child->setFightsWon(0);
+        
+        $child->setRarity($this->getRarity());
+
+        $child->setParent1($emoji1);
+        $child->setParent2($emoji2);
+
+        $entityManager->persist($child);
+        $entityManager->flush();
+
+        return new JsonResponse([
+            'message' => 'Child created',
+            'childId' => $child->getId()
+        ]);
     }
-}
+}
\ No newline at end of file
diff --git a/src/Entity/Emoji.php b/src/Entity/Emoji.php
index 56ffb08..f3bb04a 100644
--- a/src/Entity/Emoji.php
+++ b/src/Entity/Emoji.php
@@ -38,6 +38,36 @@ class Emoji
     #[ORM\JoinColumn(nullable: false)]
     private ?Rarity $rarity = null;
 
+    #[ORM\ManyToOne(targetEntity: self::class)]
+    #[ORM\JoinColumn(nullable: true)]
+    private ?Emoji $parent1 = null;
+
+    #[ORM\ManyToOne(targetEntity: self::class)]
+    #[ORM\JoinColumn(nullable: true)]
+    private ?Emoji $parent2 = null;
+
+    public function getParent1(): ?self
+    {
+        return $this->parent1;
+    }
+
+    public function setParent1(?self $parent1): self
+    {
+        $this->parent1 = $parent1;
+        return $this;
+    }
+
+    public function getParent2(): ?self
+    {
+        return $this->parent2;
+    }
+
+    public function setParent2(?self $parent2): self
+    {
+        $this->parent2 = $parent2;
+        return $this;
+    }
+
     public function getId(): ?int
     {
         return $this->id;