How to make a sprite turn into other sprites.

In my game, I want to have a card object and those card objects spawn their non-card objects where the card was when a button is pressed.

How would I do this?

So you will have your 2 sprite objects Card and Actual (Obviously your names are different)

When you trigger the event you will create object Actual at position (Card.x,Card.y)

then destroy card.

This will allow you to have the new object spawn at the same location. You will probably want to create a spawn animation as part of the Actual Objects animations so it looks a bit nicer