Ghetsis is a very very evil man, as shown by his relentless quest to conquer and his brutal deception of many, including the "good" team plasma members and his own innocent son, N. he is also a very wise man. He has successfully formed, controlled and reformed a massive criminal organization, and has even devised a cruel way to control an extremely powerful Pokemon in kyurem. Considering that you were a massive threat to his plans, how evil he is, and that his intelligence would suggest he has at least decent knowledge of Pokemon moves, he was in all likely hood trying to kill you, though as Pokemon is rated e for everyone, this isn't directly said.