Kalos walkthrough section
Pokemon X and Y Phase 9: Pre-Run Preparation
You can't fly out between E4 fights without losing the run. Prep accordingly. Inventory checklist Save scumming: The 3DS won't let you save mid-Elite-Four run.
Phase 9 Champion Diantha Kalos Champion Victory Road, Elite Four, Diantha, and Hall of Fame. 09 / 10 
Phase 9 section 1 of 12
You can't fly out between E4 fights without losing the run. Prep accordingly. Inventory checklist Save scumming: The 3DS won't let you save mid-Elite-Four run.
GuidePokemon X and Y
PhasePhase 9
Section1/12
Pre-Run Preparation
You can't fly out between E4 fights without losing the run. Prep accordingly.
Inventory checklist
| Item | Quantity | Reason |
|---|---|---|
| Full Restore | 20+ | Full HP + status. The only healing item that matters past Lv 60. |
| Max Revive | 5+ | Full HP revive. Don't run out. |
| Revive | 10+ | Half-HP revive (cheaper, more available). |
| Hyper Potion | 10+ | Cheap healing for non-emergency. |
| Full Heal | 10+ | Status removal — paralysis/sleep/freeze are common. |
| Ether / Max Ether | 5+ | PP restore for your strongest STAB moves. |
| Elixir / Max Elixir | 3+ | Restore all moves' PP. |
| X Speed / X Attack / X Sp. Atk / X Defense | 3+ each | Stat boosts that survive switches. Useful for setup mons. |
| X Accuracy | 3+ | Fixes RNG misses on Hydro Pump / Stone Edge. |
| Lum Berry (held) | 1 per Pokémon | Single-use status removal held item — saves a turn. |
Save scumming: The 3DS won't let you save mid-Elite-Four run. Save right before talking to the Pokémon League nurse (the entrance) so you can soft-reset to the start of any E4 fight without losing all four. After Diantha, you save automatically in the Hall of Fame credits.