read title

Clones, not cluttering the Data category of every sprite, when you only need it in a few sprites/one sprite, and:

Scratch Wiki wrote:

Local variables are extremely useful when a template sprite that needs to be duplicated and edited is wanted. For example, in a game where one must pop bubbles, a “bubble” sprite should be made which has personal variables like “speed” and should be programmed independently. Then it should be duplicated until there are enough bubbles. Since each bubble has an individual “speed” variable, they will not interfere with each other unlike if “speed” was a global variable.

Basically when you want it to be different in every sprite. They can still be accessed through this block:

([var v] of [sprite v])

_Bathroom_ wrote:

What is the point of ‘for this sprite only’ variable

This kind of variable can be useful, as it can have a separate value per a clone of a sprite as well.

If you have a situation where you need variables to set an x and y of a sprite, you need to use for this sprite only or else everything will technically be there too. That's why it exists.

^ what he said

Thanks for all of your answers!