I decided to try something new and make a "meme template" out of the horny jail-typhlosion image I generated a couple of days ago, mostly as a learning experience. It seems to work all right.

You can either try to get in the character you want right away, or just do a few generations until you get the "HORNY JAIL" text to generate correctly and go from there using inpainting. In my testing it took a few run to get the text right. Background and foreground around the box are pretty much baked into the model too.

There is no trigger required, just include the character you want to jail.