Riding

Riding, also known as mounting, is the behavior that allows an entity to mount another entity.

Riding connects one entity to another. An entity riding another entity is called a passenger (or rider), and an entity being ridden is called a mount (or vehicle). An entity can be both a passenger and a mount at the same time if it is riding another entity while being ridden by other entities.

An entity can only ride at most one entity at the same time. Most entities support only one passenger, but boats, bamboo rafts, camels and camel husks can support two passengers at the same time, while a happy ghast can support four passengers at the same time. In Java Edition, by modifying entity NBT through commands, an entity may be ridden by any number of entities. In Bedrock Edition, a baby hoglin can support 3 baby piglins, which looks like they are stacked one by one. However, in Java Edition, baby piglins ride each other and are indeed stacked one by one, instead of all riding on the hoglin. In Bedrock Edition, a player can support 2 parrots. However, in Java Edition, parrots become not entities and are stored into the player's NBT data when sitting on the shoulders of a player.