Old Customized – Minecraft Wiki

Customized, retroactively labelled Old Customized by later game versions, was a world type that replaced the normal varied terrain of the Overworld with custom features. Because, as of snapshot 18w06a, it was removed completely due to the rewrite of the world generation, it was then replaced by a new, easy-to-customize but considerably more limited substitute world type called Buffet. Custom worlds returned in 20w21a, though they are completely different; this version also renamed this world typ

Pocket Edition v0.16.0 alpha – Minecraft Wiki

Village/Structure (old) – Minecraft Wiki

Chunk – Minecraft Wiki

Structure Block – Minecraft Wiki

Grindstone – Minecraft Wiki

Emerald – Minecraft Wiki

Old Customized – Minecraft Wiki

Villager – Minecraft Wiki

Sheep – Minecraft Wiki