Issue Description:

Note: If this bug occurs in a modpack, please report this to the modpack author. Otherwise, delete this line and add your description here.

What happens:

 Noibat scored a critical hit at which point the game crashed.
he is part of the crash log for easy reading and I'll attach the full crash.
`Time: 7/17/17 5:34 AM
Description: Ticking entity

java.lang.RuntimeException: java.lang.NullPointerException
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:646)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:590)
at pokecube.core.entity.pokemobs.helper.EntityTameablePokemob.returnToPokecube(EntityTameablePokemob.java:749)
at pokecube.core.entity.pokemobs.helper.EntityAiPokemob.func_70609_aI(EntityAiPokemob.java:759)
at net.minecraft.entity.EntityLivingBase.onSpongeDeathUpdate(EntityLivingBase.java:3856)
at net.minecraft.entity.EntityLivingBase.redirect$causeTrackDeathUpdate$zde000(EntityLivingBase.java:3846)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:322)
at net.minecraft.entity.EntityLiving.func_70030_z(EntityLiving.java:280)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:388)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2081)
at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:388)
at pokecube.core.entity.pokemobs.helper.EntityTameablePokemob.func_70071_h_(EntityTameablePokemob.java:567)
at pokecube.core.entity.pokemobs.helper.EntityStatsPokemob.func_70071_h_(EntityStatsPokemob.java:455)
at pokecube.core.entity.pokemobs.helper.EntityEvolvablePokemob.func_70071_h_(EntityEvolvablePokemob.java:359)
at pokecube.core.entity.pokemobs.helper.EntityMountablePokemob.func_70071_h_(EntityMountablePokemob.java:175)
at pokecube.core.entity.pokemobs.helper.EntityAiPokemob.func_70071_h_(EntityAiPokemob.java:803)
at pokecube.core.entity.pokemobs.helper.EntityHungryPokemob.func_70071_h_(EntityHungryPokemob.java:317)
at pokecube.core.entity.pokemobs.helper.EntityPokemobBase.func_70071_h_(EntityPokemobBase.java:610)
at org.spongepowered.common.event.tracking.TrackingUtil.tickEntity(TrackingUtil.java:158)
at net.minecraft.world.WorldServer.redirect$onCallEntityUpdate$zkg000(WorldServer.java:2868)
at net.minecraft.world.World.func_72866_a(World.java:1976)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:833)
at net.minecraft.world.World.func_72870_g(World.java:1939)
at net.minecraft.world.World.func_72939_s(World.java:6032)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:2205)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:761)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:665)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:239)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:523)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at jds.bibliocraft.events.EventItemToss.DroppedItemEvent(EventItemToss.java:22)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_253_EventItemToss_DroppedItemEvent_ItemTossEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:634)
... 29 more

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Server thread
Stacktrace:
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:646)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:590)
at pokecube.core.entity.pokemobs.helper.EntityTameablePokemob.returnToPokecube(EntityTameablePokemob.java:749)
at pokecube.core.entity.pokemobs.helper.EntityAiPokemob.func_70609_aI(EntityAiPokemob.java:759)
at net.minecraft.entity.EntityLivingBase.onSpongeDeathUpdate(EntityLivingBase.java:3856)
at net.minecraft.entity.EntityLivingBase.redirect$causeTrackDeathUpdate$zde000(EntityLivingBase.java:3846)
at net.minecraft.entity.EntityLivingBase.func_70030_z(EntityLivingBase.java:322)
at net.minecraft.entity.EntityLiving.func_70030_z(EntityLiving.java:280)
at net.minecraft.entity.Entity.func_70071_h_(Entity.java:388)
at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:2081)
at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:388)
at pokecube.core.entity.pokemobs.helper.EntityTameablePokemob.func_70071_h_(EntityTameablePokemob.java:567)
at pokecube.core.entity.pokemobs.helper.EntityStatsPokemob.func_70071_h_(EntityStatsPokemob.java:455)
at pokecube.core.entity.pokemobs.helper.EntityEvolvablePokemob.func_70071_h_(EntityEvolvablePokemob.java:359)
at pokecube.core.entity.pokemobs.helper.EntityMountablePokemob.func_70071_h_(EntityMountablePokemob.java:175)
at pokecube.core.entity.pokemobs.helper.EntityAiPokemob.func_70071_h_(EntityAiPokemob.java:803)
at pokecube.core.entity.pokemobs.helper.EntityHungryPokemob.func_70071_h_(EntityHungryPokemob.java:317)
at pokecube.core.entity.pokemobs.helper.EntityPokemobBase.func_70071_h_(EntityPokemobBase.java:610)
at org.spongepowered.common.event.tracking.TrackingUtil.tickEntity(TrackingUtil.java:158)
at net.minecraft.world.WorldServer.redirect$onCallEntityUpdate$zkg000(WorldServer.java:2868)
at net.minecraft.world.World.func_72866_a(World.java:1976)
at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:833)
at net.minecraft.world.World.func_72870_g(World.java:1939)

-- Entity being ticked --
Details:
Entity Type: pokecube_ml:pidove (pokecube.core.entity.pokemobs.GenericPokemob519)
Entity ID: 43689
Entity Name: Pidove
Entity's Exact location: -200.48, 83.84, 1208.73
Entity's Block location: World: (-201,83,1208), Chunk: (at 7,5,8 in -13,75; contains blocks -208,0,1200 to -193,255,1215), Region: (-1,2; contains chunks -32,64 to -1,95, blocks -512,0,1024 to -1,255,1535)
Entity's Momentum: 0.02, 0.01, 0.07
Entity's Passengers: []
Entity's Vehicle: ERROR NullPointerException: null
World:: WorldServer{LevelName=BOP Pokecube 54, DimensionId=0, DimensionType=minecraft:overworld}
Owner:: 59838dcc-8b8e-4fa0-9af2-36141389bb0a
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:6032)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:2205)
crash-2017-07-17_05.34.05-server.txt
`

What you expected to happen:

Not to randomly crash

Affected Versions (Do not use "latest"):

• Pokecube Core:6.5.3
• Pokecube Revival (if applicable):6.4
• Pokecube Mobs (if applicable):2.7.2
• Minecraft: 1.12
• Forge:14.21.1.2431

due to massive changes in sponge since this issue was released, the stuff it in won't really help much anymore, so I am closing this one, If it still occurs, remake the issue using the latest sponge/pokecube.

I will get this looked into, thanks for including the crash report.

This seems to be an issue somehow related to sponge, can you see if you can get it replicated in an environment without sponge?

The crash is caused by something going wrong when defeating a pokemob owned by either an NPC or an offline player.