Spawn eggs cover 88 of 158 entities — and exactly three real mobs have none
70 entity types have no spawn egg, but 65 of those are boats, projectiles and display entities. Only Giant, Illusioner and Mannequin are actual mobs you cannot egg.
"There is no spawn egg for it" is usually true for a boring reason — the thing is not a mob. Counted from Mojang's own registry dump for 26.2, the same data the converter on this page uses.
158 entity types, 88 spawn eggs
70 entity types have no spawn egg. Broken down, almost all of them are things nobody would expect an egg for:
| category | count |
|---|---|
| vehicles (boats, rafts, minecarts) | 27 |
| projectiles (arrows, fireballs, thrown items) | 17 |
| displays, markers, item frames, TNT, falling blocks, orbs | 21 |
| everything else | 5 |
The five, and only three of them count
The remainder is giant, illusioner, mannequin, player and wither_skull.
player is not summonable and wither_skull is a projectile that slipped my category list — so the real answer is three mobs in Minecraft have no spawn egg:
- Giant — the oversized zombie, in the game since Alpha and never finished.
- Illusioner — the illager that was implemented, given full behaviour, and then never added
to any structure or raid.
- Mannequin — the newest of the three.
All three exist, all three have working AI and models, and none is obtainable in survival or from the creative inventory. /summon minecraft:giant ~ ~ ~ works fine.
That is the practical takeaway for anyone building with them: they are /summon-only, so a map that uses one cannot hand the player an egg for it, and a datapack cannot add the egg without adding a new item.
Why the egg count is not the mob count
88 eggs against 158 entity types looks like a large gap and is not. Once you remove the 27 vehicles — every wood type has a boat, a chest boat and a raft variant, which is where that number comes from — and the 17 projectiles, the registry is much smaller than it first appears.
Boats alone are the single biggest reason the entity list is longer than the mob list.
Converting between egg and entity
The naming rule is total: an egg is <entity_id>_spawn_egg, with no exceptions in either direction. Every one of the 88 eggs maps to an entity whose id is the egg id minus the suffix, and there are zero eggs whose entity does not exist.
So the conversion is mechanical, which is what the tool on this page relies on — and it also means a missing egg is always a deliberate omission by Mojang rather than a naming mismatch you could work around.