I did a version of the jose-ramiro picture.. however it looked well.. it looked really bad.. so i decided to renew the image by making a better look.
Now, Mighty Mouse was fighting against a villain, in the process, he was hit with a beam which was supposed to defeat mighty, however it didn't work. Mighty Defeated the villain, however he didn't know that the beam had a different effect. Instead of weakening his powers, his powers could be transferred into anyone that actually touched him. Pearl was unfortunate to touch Mighty while the beam affected him.. resulting in his powers being transferred into Pearl, the effects were permanent on Pearl.. hence her becoming a superhero like Mighty is.
Anyway.. Mighty Mouse is a cartoon created by terrytoons as part of cbs/paramount and viacom.