The Deep Colosseum is an underground battle facility, even more challenging than Pyrite Colosseum. You'll face a series of elite trainers, including the four Cipher Admins you've encountered before: Miror B., Dakim, Venus, and Ein. Each admin will have a stronger team and potentially new Shadow Pokémon. This is a gauntlet, so ensure your team is fully healed and your items are stocked before entering.

Shadow Pokémon to Snag:
- Shadow Sudowoodo (Level 35): Used by Cipher Admin Dakim. Rock type, weak to Water, Grass, Fighting, Ground, Steel.
- Shadow Delibird (Level 35): Used by Cipher Admin Venus. Ice/Flying type, weak to Rock, Electric, Fire, Steel.
- Shadow Smeargle (Level 35): Used by Cipher Admin Miror B. Normal type, no weaknesses, but also no resistances.
- Shadow Ursaring (Level 35): Used by Cipher Admin Ein. Normal type, weak to Fighting.
Winning the Deep Colosseum will grant you access to Realgam Tower, the final stronghold of Team Cipher.