Walkthrough
Just north of Glimwood Tangle is Ballonlea, the location of the next Pokemon Gym. It's a small town that is surrounded by the mushrooms of the Glimwood Tangle, which give the city a perpetual night feel. There is not much to Ballonlea except for the Pokemon Gym.
Trainers
Pokemon Breeder Elena: Level 30 Dottler
Items
Choice Scarf: Deliver Old Letter To Frank In Southwestern House
Eviolite: Defeat Pokemon Breeder Elena
Big Mushroom: Hidden Near Yellow Mushroom Between Houses
Balm Mushroom: Hidden Near Pokemon Center
TM21: Near Eastern Giant Green Mushroom
TM77: From Woman In House
TM78: Buy/Wear Fire Outfit & Show Man In Northwestern House
Pokemon Center PokeMart Items (Through Storyline Progression)
Poke Ball, Great Ball, Ultra Ball
Potion, Super Potion, Hyper Potion, Max Potion, Full Restore
Antidote, Burn Heal, Ice Heal, Awakening, Paralyze Heal, Full Heal, Revive
Escape Rope, Repel, Super Repel, Max Repel, Poke Doll