1. Accept a bounty that takes place on Route U3 from officer Jenny to the northwest of Striation City.
2. Accept the “Treasures and Pots” quest from Travis in front of the Dragonspiral Tower north of Iccirus city.
3. Fly to Drifveil city and grab your eggs + flame body pokemon.
4. Hit “goto” on your route U3 bounty while in Driftveil and let your character automatically walk until the start of route U3.
5. Hit “goto” on your “Treasures and Pots” quest and let your character automatically walk until Driftveil city.
6. Repeat from step 4 until your eggs hatch.
This method walks automatically for 4 and a half minute, covering about 1250 steps. This means you only need to click once every 4 and a half minutes, as opposed to manually walking a long route.