How do you make images change in so long like pokeplushies adoptables?

Question: How do you make images change in so long like pokeplushies adoptables!?

I've seen people do it, they evolve or transform in so long, Any help!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

I really want to know this too!.!.!. I've been hunting on the internet and a friend of mine said it's with PHP coding but I have yet to find the specific code, etc, that makes them change!. :(Www@QuestionHome@Com