Deltarune Chapter 4 conceals numerous hidden challenges, with elusive boss battles topping the list. Among these is the enigmatic **TV Building encounter**, accessible through a cryptic numerical sequence. Struggling to unlock **Mike’s Chamber**? Discover the essential digits below to confront this hidden foe.

Locating the TV Building Chamber

**The secret chamber lies within Castle Town’s television structure**. Regardless of party composition, navigate through the facility until discovering a labeled entrance. Access requires solving a numeric puzzle linked to in-game phone contacts.

Unlocking the Chamber

**Primary access code: 6453**. Alternative combinations like 5962 might prove effective depending on discovered contacts. The numeric sequence persists through multiple playthroughs but remains variable per save file.

Chamber Contents Revealed

**Interactive feline statues dominate the space**. Manipulate these to obtain strange powers – one summons a spectral appendage for item retrieval, while others conceal hidden loot. The chamber’s centerpiece features a microphone-shaped artifact beside another sealed entrance.

Confronting the Vocal Antagonist

**Overcoming this opponent demands mastery of three distinct phases**. Each segment features unique mechanics requiring precise timing and spatial awareness.

Phase 1: Audio Regulation

The encounter begins with dynamic sound management – maintain maximum volume during applause segments and silence during lulls. Neutral phases necessitate microphone evasion tactics.

Phase 2: Feline Interaction

Utilize the spectral hand acquired earlier to repeatedly interact with multiple cat manifestations. Successful engagement progresses combat.

Phase 3: Multi-Opponent Onslaught

Survive simultaneous assaults from three variants while collecting kittens into your basket. Successful containment triggers the fusion sequence.

Final Phase: Combined Entity

Persistent interaction with merged cat entities culminates in their retreat. Post-battle dialogue reveals the chamber’s caretakers aren’t actual counterparts of Mike, whose identity remains shrouded.

Post-Battle Rewards

**Victory unlocks three experimental challenges**:
– **Pluey**: Navigate falling hazards while transporting cats
– **Jongler**: Score points through precise projectile throws
– **Battat**: Rapidly strike color-coded targets under time constraints

These minigames remain accessible via the chamber for repeated attempts.