diff --git a/mappings/net/minecraft/entity/EntityType.mapping b/mappings/net/minecraft/entity/EntityType.mapping
index ec19b4103c..b89d82df13 100644
--- a/mappings/net/minecraft/entity/EntityType.mapping
+++ b/mappings/net/minecraft/entity/EntityType.mapping
@@ -4,6 +4,7 @@ CLASS aid net/minecraft/entity/EntityType
 		FIELD b entityClass Laik;
 		FIELD c saveable Z
 		FIELD d summonable Z
+		FIELD f size Laia;
 		METHOD a disableSummon ()Laid$a;
 		METHOD a setSize (FF)Laid$a;
 			ARG 1 width
@@ -12,6 +13,7 @@ CLASS aid net/minecraft/entity/EntityType
 		METHOD a create (Laik;)Laid$a;
 		METHOD a build (Ljava/lang/String;)Laid;
 		METHOD b disableSaving ()Laid$a;
+	CLASS aid$b EntityFactory
 	FIELD A FIREWORK_ROCKET Laid;
 	FIELD C GHAST Laid;
 	FIELD D GIANT Laid;
@@ -92,6 +94,7 @@ CLASS aid net/minecraft/entity/EntityType
 	FIELD ba category Laik;
 	FIELD bb saveable Z
 	FIELD bc summonable Z
+	FIELD bd fireImmune Z
 	FIELD be translationKey Ljava/lang/String;
 	FIELD bf textComponent Ljm;
 	FIELD bg lootTableId Lqr;
@@ -122,8 +125,13 @@ CLASS aid net/minecraft/entity/EntityType
 	FIELD y EYE_OF_ENDER Laid;
 	FIELD z FALLING_BLOCK Laid;
 	METHOD <init> (Laid$b;Laik;ZZZLcom/mojang/datafixers/types/Type;Laia;)V
+		ARG 1 factory
+		ARG 2 category
 		ARG 3 saveable
 		ARG 4 summonable
+		ARG 5 fireImmune
+		ARG 6 dataFixerType
+		ARG 7 size
 	METHOD a isSaveable ()Z
 	METHOD a createSimpleBoundingBox (DDD)Lcrd;
 	METHOD a createInstanceFromId (ILbgw;)Lahz;
@@ -135,6 +143,7 @@ CLASS aid net/minecraft/entity/EntityType
 	METHOD a loadFromEntityTag (Lbgw;Lavn;Lahz;Lib;)V
 	METHOD a spawnFromItemStack (Lbgw;Lbbq;Lavn;Lev;Lail;ZZ)Lahz;
 	METHOD a spawn (Lbgw;Lib;Ljm;Lavn;Lev;Lail;ZZ)Lahz;
+	METHOD a getOriginY (Lbgz;Lev;ZLcrd;)D
 	METHOD a fromTag (Lib;)Ljava/util/Optional;
 		ARG 0 compoundTag
 	METHOD a getEntityFromTag (Lib;Lbgw;)Ljava/util/Optional;
@@ -144,11 +153,13 @@ CLASS aid net/minecraft/entity/EntityType
 		ARG 2 entityProcessor
 	METHOD a get (Ljava/lang/String;)Ljava/util/Optional;
 	METHOD a register (Ljava/lang/String;Laid$a;)Laid;
+	METHOD a isTaggedWith (Lyz;)Z
 	METHOD b isSummonable ()Z
 	METHOD b create (Lbgw;Lib;Ljm;Lavn;Lev;Lail;ZZ)Lahz;
 	METHOD b loadEntityFromTag (Lib;Lbgw;)Ljava/util/Optional;
 		ARG 0 compoundTag
 		ARG 1 world
+	METHOD c isFireImmune ()Z
 	METHOD d getCategory ()Laik;
 	METHOD e getTranslationKey ()Ljava/lang/String;
 	METHOD f getTextComponent ()Ljm;
@@ -158,3 +169,4 @@ CLASS aid net/minecraft/entity/EntityType
 	METHOD j getDefaultSize ()Laia;
 	METHOD k getMaxTrackDistance ()I
 	METHOD l getTrackTickInterval ()I
+	METHOD m alwaysUpdateVelocity ()Z
diff --git a/mappings/net/minecraft/entity/mob/SlimeEntity.mapping b/mappings/net/minecraft/entity/mob/SlimeEntity.mapping
index c174fe81cd..f5aef0137a 100644
--- a/mappings/net/minecraft/entity/mob/SlimeEntity.mapping
+++ b/mappings/net/minecraft/entity/mob/SlimeEntity.mapping
@@ -6,6 +6,9 @@ CLASS auk net/minecraft/entity/mob/SlimeEntity
 	FIELD bz SLIME_SIZE Lqg;
 	FIELD c sizeY F
 	FIELD d sizeZ F
+	METHOD a initSlime (IZ)V
+		ARG 1 size
+		ARG 2 isNewSpawn
 	METHOD dU getSquishSound ()Lyh;
 	METHOD dV getJumpSound ()Lyh;
 	METHOD dW getSize ()I