Only Pokémon that are inside a ranch block can be bred; attempting to conduct the breeding process without a ranch block will produce no results. If the breeding process is successful, the resultant Egg will be visible inside the ranch block and can be claimed. A single Pokémon or a group of Pokémon that cannot breed with each other can be placed inside the ranch block with no repercussions. However, this will not result in anything material and is purely aesthetic.
Pokémon inside a ranch block can be interacted with to show their breeding progress, or whether they are able to breed. Most other interactions with Pokémon, such as mounting and using Rare Candies, are inaccessible for Pokémon inside a ranch block. However, interactions which involve harvesting resources, namely Pokémon-specific interactions with Camerupt, Mareep, and Miltank, will function normally.
A ranch block requires a pickaxe to be broken and retrieved. Breaking it will reset any progress that was made with the breeding process and any ranch upgrades that were previously applied to it. Any Pokémon that were inside the ranch block will be returned to the PC.
If the player is outside the ranch block's range, the block will descend into the ground, leaving only its blue flower visible. Moving back into the ranch block's range will cause it to emerge from the ground again.