After defeating the first Essentia inside of Lysandre Labs, I battled another one and I beat her Whimsicott, Mawile, and Granbull with Aerodactyl and Pangoro. I then battled the third Essentia's Persian with Pangoro's Hammer Arm and then fourth Essentia's Crobat and Malamar with my Raichu and Aerodactyl. After finishing those battles, I headed back out of Lysandre Labs to North Boulevard and I visited the Lumiose Museum and spoke to the director inside, then I headed back to Magenta Plaza. After I completed all the Looker missions, I went to the local Pokemon Center and I healed my Pokemon there. I then stepped outside and flew to Laverre City next and I headed north to Route 15/the Laverre Nature Trail.