Walkthrough: After defeating your first Island Trial, the gate to Route 3 will open. Before heading there next, Professor Kukui will quickly show you how to use a Z-Crystal to thus perform a Z-Move with one of your Pokemon. After he does, he will mention how Lillie had wondered off on Route 3. Taking him up on this hint, you will need to go find her by making through the wave of trainers on Route 3.
Island Scan Pokemon:
Charmander
Wild Pokemon:
Initial Pokemon (Levels 9-12): Mankey(30%), Spearow(30%), Cutiefly(30%), Hawlucha(10%)
Flying Pokemon (Levels 10-13): Spearow(70%), Rufflet(30%)
Berry Trees (Level 10-13): Crabrawler(100%)
Initial Pokemon (Levels 9-12): Mankey(30%), Cutiefly(30%), Spearow(29%), Hawlucha(10%), Bagon(1%)
SOS Pokemon #1 (Levels 9-12): Mankey, Cutiefly, Spearow, Hawlucha, Salamence
SOS Pokemon #2 (Levels 9-12): Mankey, Cutiefly, Spearow, Hawlucha, Bagon
Trainers:
Rising Star Ian - Level 12 Psyduck
Rising Star Tatiana - Level 12 Cottonee
Rising Star Joshua - Level 12 Growlithe
Ace Trainer Makana - Level 14 Slowpoke, Level 14 Butterfree
Items:
Heal Ball - Near Rising Star Ian
Sharp Beak - In Flying Pokemon Area
Soothe Bell - From Man On East Cliff
Super Potion - Near Rising Star Joshua
TM19 - Defeat Ace Trainer Makana
TM83 - Behind Tauros Rocks
Nest Ball - Right of Berry Tree
Leppa Berry - Berry Tree
Chesto Berry - Berry Tree
Sitrus Berry - Berry Tree
Pecha Berry - Berry Tree
Cheri Berry - Berry Tree
Stardust (Hidden) - Gap In Wall In Flying Pokemon Area