The Toy Story mashup pack was released on June 24, 2019 by Minecraft in collaboration with the "Toy story" movie saga.

Official
This Mashup was created by Minecraft.

What is a "MashUp"?
The mashup packages are combinations between Skins, map and a usable texture, all of this includes a mashup package.

My Discord "Mellitos2008"
In case you have any questions or information.

0:00 Equitpment and Construction
3:51 Nature and other things
6:13 Update 1.19 and more
8:33 Update 1.20
11:44 All mobs
14:59 Mobs variants
16:46 Dimensions
18:40 Final