I was battling a scientist, his first pokemon was an Arctovish with my new Gigatamax Intelleon. When I clicked my Intel's Gigatamax move it went back to its former move then the battle ended with a loss. It wasn't my Intelleon, I tested the move on a different trainer and it worked. I went to Creative Mode and find him but he's gone. Which move of Arctovish's caused the crash?

You would need to provide a log of when this happened for us to investigate, if possible please attempt to find one.