what did Mr. Dark do with Mr. Cooger?

When Mr. Coogar frames Jim and Will as robbers and then runs back to the carousel to make himself older. As he rides the carousel, the boys take over the control and age him until he is a shriveled mummy. The boys think Mr. Cooger is dead, but Mr. Dark resurrects him with a 100,000 volt jolt, dubbing him "Mr. Electrico". At the end of the story, the mummified Mr. Cooger collapses into a cloud of dust.