>>36467117He was using Shadow Ball. Though it hadn't appeared in the games yet, the movie was promoting Gen 2 (Donphan, Snubbull, Togepi, and Marill), showcasing stuff that was planned to come in the new games. Aura Sphere wasn't even a thought yet.
>>36462846Umm, sweetie, the only Dragon-typoe move in Gen 1 was Dragon Rage (which does set damage), and even if that weren't the case, Gyarados is Water/Flying and Charizard is Fire/Flying. Megas weren't a thing yet, so neither had Dragon typing.