Lore corner: nobody knows what the Hollow King is

In plain words

The BallOrcs Realm is loud, bouncy, and gloriously ridiculous — every orc a one-of-a-kind sphere of clashing parts and proud little noises. Then the Hollow King came. Nobody knows what it is. What's known is what it leaves behind: orcs drained of colour and bounce, flattened into silent grey discs that roll in slow, perfect, joyless circles. The elders call it the Flattening. Your orc is built in the village barber's chair minutes before the wave arrives — too new to be in the King's catalogue, and so the only one it cannot flatten. Yet. The barber's instruction is simple: reignite the Elemental Founts before the last one goes out.

Under the hood

The villain is a design thesis as much as a character:

• Scary because it is plain. In a world where everyone is assembled from wonderfully mismatched parts, the Hollow King is a featureless, perfectly smooth sphere — no components at all. The tone stays toy-box comedy on the surface, with real stakes underneath: a world losing its personhood.
• Narrative and progression are the same system. Each level is one Fount's territory; reigniting it restores that element to the Realm and unlocks its component family in the barber's chair. There is no separate unlock economy to tune — story beats and reward beats are one data table.
• The mechanics are diegetic. Why can your orc travel to future BallOrcs titles? Because it stays ahead of the King's catalogue — the cross-game character compatibility shipping in the shared ballorcs-core module (versioned, unknown-field-tolerant save format) is literally the story's premise.
• Deliberately unexplained in v1. The slice ends with three Founts burning and the King turning its blank face toward the player. What it is, and why it only flattens catalogued orcs, is series fuel — the docs pin the mystery so future titles can pay it off without retcons.