How to Make a Custom Mob for Minecraft Bedrock: Skin, Stats, AI and Spawning

Custom mobs are the biggest step up from items and blocks. A mob has a model, a skin, stats, an AI and spawn rules, and if one of those is off it either does nothing or ruins the world. The good news: in GodCraft you don't have to build any of it from zero. This guide walks through making a "Frost Zombie", a tougher zombie that only shows up in cold biomes.

Template or blank?

1. Open your add-on in the Workbench tab, tap Items, Entities, ... and then Add Object.
2. Open Mobs. You'll see two kinds of entries:
   • Custom at the top: here you make a new mob. Choose Custom Mob for a blank one, or tap any mob in the list to use it as a template.
   • The vanilla mobs below Custom: these replace the real mob in the game. Every zombie in the world would change.

For a first mob, use Custom and pick a template that's close to what you want. A template copies the model, animations, skin and behavior of that mob into a new mob with its own godcraft: identifier, so the original stays untouched. For the Frost Zombie, we pick Zombie. Some newer mobs show a lock and need Premium; the older ones are free.

Skin and model

The editor opens with a 3D preview. Tap it to choose Select (library), Gallery (Skin), Files (Skin), Paint 2D or Edit model.

Because the template already has a matching skin, the fastest route is Paint 2D: recolor the zombie's green to pale blue, add some white frost on the shoulders, done. If you load your own image, it must fit the model's layout, so start from the template skin rather than a random picture.

Name, category and identifier

• Name: "Frost Zombie". This is what death messages and spawn eggs show.
• Category: Hostile, Passive, Neutral or Boss.
• Spawn Group: Monster, Creature, Water Creature, Ambient and a few more. It decides which mob cap the mob counts against, so a hostile mob belongs in Monster.
• Identifier: fills in from the name. Below it the editor shows the /summon command to spawn the mob, which you can tap to copy.

Stats

In the stats section, set Health and Max Health, Damage, Speed, Knockback Resistance and Follow Range. A vanilla zombie has 20 health, so for the Frost Zombie we use 30 and a little more damage, but keep the speed the same. Faster mobs feel much harder than extra health does.

Below that, Size sets the hitbox (Width and Height). If you scale a model up, raise these too, or arrows will fly through its head.

AI goals

Open AI Goals - Land. Each toggle is a behavior the mob can do. A hostile mob needs at least:

• Nearest Attackable, so it picks a target (usually the player),
• Melee Attack (or Ranged Attack), so it actually hits,
• Hurt by Target, so it fights back,
• Random Stroll, Look at Player and Float, so it moves naturally and doesn't drown.

A passive animal uses Panic, Random Stroll and Follow Parent instead. Water mobs have their own set in AI Goals - Aquatic.

Other sections cover breathing, navigation (opening doors, avoiding sun), riding, breeding, taming and inventory. With a template, these already match the original mob, so only touch what you want to change.

Drops and experience

In Loot & Experience, set the Experience Reward and the Drops (loot table). The Frost Zombie drops rotten flesh and sometimes ice. If your add-on has a custom item, this is a great place to make it obtainable.

Spawn eggs and natural spawning

With Is Spawnable on (under Entity Description), the mob gets the usual spawn egg in the creative inventory. If you'd like a separate egg item with its own icon, add a Spawn Egg object and link it to your mob.

To make the mob appear on its own, open Natural spawning and turn on Spawns naturally. Then set:

• Spawn weight: higher is more common. The hint gives the scale: zombie 100, pig 10.
• Min group size and Max group size.
• Light levels: monsters usually spawn at 0 to 7, animals in daylight.
• Surface, underground or underwater, Time of day and difficulty.
• Biome tags: for the Frost Zombie we choose cold biomes only.

Start with a low weight. It's much easier to make a rare mob more common later than to clean up a world flooded with a new monster.

Test it

1. Save the mob and the add-on, then Install from Workbench.
2. Activate both packs on a new test world with cheats on.
3. Use the copied /summon command or the spawn egg.

Common problems

• The mob disappears right away: the world is on Peaceful, which removes hostile mobs. Switch to Easy or higher.
• It just stands there: AI goals are missing. Add Random Stroll, and for hostile mobs Nearest Attackable plus Melee Attack.
• It's invisible or has a purple and black skin: the resource pack isn't active, or the skin image didn't save.
• It never spawns naturally: check the biome tags and light levels, and remember spawn weight competes with every other mob.