Tera Shell Analysis

Implementation Location: src/abilities.cc - TeraShell ability definition

Core Mechanic:

• Reduces all damage taken by 50% when at full HP
• Only affects moves with 1x or greater type effectiveness
• Applied after type effectiveness calculations
• Does not affect moves that would deal 0 damage

Technical Details:

• Triggers on onAfterTypeEffectiveness event
• Checks if *mod >= UQ_4_12(1.0) (normal effectiveness or better)
• Checks if BATTLER_MAX_HP(battler) (at full HP)
• If both conditions met, sets *mod = UQ_4_12(0.5) (halves effectiveness)
• Applied to target (defensive ability)
• Ability is breakable by abilities like Mold Breaker

Strategic Applications:

• Provides defensive bulk similar to Multiscale but affects all attacks
• Forces opponents to use chip damage or status moves to break the effect
• Effective against both physical and special attacks
• Synergizes well with recovery moves and healing abilities

Extended Description (294 characters): At full HP, all attacks deal half damage regardless of type effectiveness. This powerful defensive ability transforms the holder into a formidable wall, requiring strategic chip damage or status conditions to overcome. Unlike other defensive abilities, Tera Shell provides universal protection.