Finished with the X run. Ended up with a few surprises that I liked.
Siren lv71 (Route 12) w/ Wave Incense
Surf/Water Pulse/Aurora Beam/Muddy Water
Zampy lv69 (Starter) w/ Ampharosite
Dragon Pulse/Signal Beam/Discharge/Thunder
Flyby lv70 (Route 22) w/ Scope Lens
Poison Fang/Acrobatics/Fly/Bite
Nightmare lv71(Tower of Mastery, Lucario) w/ Banettite
Shadow Sneak/Feint Attack/Shadow Ball/Psych Up
Final Boss lv55 (Pokemon Village) w/ Expert Belt
Toxic/Dragon Rush/Dragon Claw/Dig
I ended up with Flaaby as my starter, and nearly wiped on the first rival battle. Paralyze was really clutch.
Also, in the Santalune Forest (way at the beginning), I ended up finding a shiny Mega Lucario and added him to the team. He ended up dying right at the end of the elite four, so I didn't include him in my HOF.
I will probably move on to Sun next, using the same rules.
Username: Pluckles
Game: Sun
Additional rules: No legendaries, randomized items, randomized alternative forms (megas in wild, etc.), shiny clause