Injustice Mobile features some of the hardest-to-obtain characters in mobile gaming. From Metal-tier fighters requiring thousands of Nth Metal to time-limited challenge exclusives, certain characters define rarity. This guide ranks the top 5 rarest characters and explains why they're so difficult to acquire.
Ranking Criteria
Rarity is determined by:
- Acquisition method — exclusive vs. general availability
- Drop rates — statistical probability of obtaining
- Cost — currency required for acquisition
- Availability window — time-limited vs. permanent
#1: Metal The Batman Who Laughs
Rarity: 10/10
Metal The Batman Who Laughs is one of the two original Metal characters released in update 3.0. He can only be obtained through:
- Nth Metal Ultimate Pack — 60% chance per pack at 800 Nth Metal
- Phantom Zone — 5% chance as Elite ultimate reward
- Nth Metal Pro Pack — 7% chance at 400 Nth Metal
- Nth Metal Pack — 2% chance at 200 Nth Metal
Why He's So Rare
- Requires 25 copies for full Elite VII promotion
- Each copy costs 800-1,667 Nth Metal depending on pack choice
- Phantom Zone only offers 5% chance even with maximum completions
- Estimated total cost: $400-600 if buying Nth Metal with real money
His Wild Card passive lets him select a tarot card after every special attack, providing Damage Reduction, Damage Reflect, Power Steal, or Stun. Combined with Savage Robin's bleed application, he's one of the most versatile characters in the game.
For promotion requirements and costs, see our how to promote Nth Metal characters guide.
#2: Metal The Merciless
Rarity: 9.5/10
Metal The Merciless (Ares/Metal) is the second original Metal character. His acquisition methods mirror The Batman Who Laughs:
- Nth Metal Ultimate Pack — 60% chance at 800 Nth Metal
- Phantom Zone — 5% chance as Elite ultimate reward
- Nth Metal Pro Pack — 7% chance at 400 Nth Metal
- Nth Metal Pack — 2% chance at 200 Nth Metal
Why He's So Rare
- Shares the same acquisition difficulty as Batman Who Laughs
- Requires 25 copies for Elite VII (43 total with evolution)
- Strength of War passive builds with every hit, culminating in unblockable specials
- Armor generation for the entire team on every tag-in
His power makes him worth the investment, but the cost and rarity make him inaccessible for most players.
#3: Batman Ninja Catwoman
Rarity: 9/10
Batman Ninja Catwoman is a Metal character introduced in update 3.2. Her acquisition is slightly easier than the original two Metal characters:
- Phantom Zone — available as a rare drop
- Nth Metal packs — various drop rates
- Special events — occasional bundles
Why She's So Rare
- Metal characters require 25 copies for Elite VII
- Her Cat Rage passive is one of the strongest in the game
- Gear disable on Dark Power specials is game-breaking
- Only available through Nth Metal packs (no Challenge Mode)
She's the centerpiece of the Batman Ninja team, dealing devastating damage with her basic attacks while draining power and potentially stealing opponent gear.
For team building with her, see our Batman Ninja Catwoman guide.
#4: Nightwing/Batman Ninja
Rarity: 8.5/10
Nightwing/Batman Ninja is another Metal character from update 3.2:
- Phantom Zone — rare drop from Elite crystals
- Nth Metal packs — various rates
Why He's So Rare
- Metal character requiring 25 copies for Elite VII
- His combo meter generation is essential for Batman Ninja team synergy
- No alternative acquisition methods
- Low Phantom Zone drop rates (same 5% as other Metal characters)
His passive keeps combo meters high for the entire team, making him a support linchpin for the Batman Ninja composition.
#5: Shazam/New 52 (Metal)
Rarity: 8/10
Shazam/New 52 is the final Metal character released:
- Phantom Zone — Elite crystal drop
- Nth Metal packs — lowest drop rates among Metal characters
- Store bundles — occasional paid offers
Why He's So Rare
- Highest base stats among Metal characters (5,700 combined)
- Lightning Storm provides team support through power generation
- Limited availability in packs compared to earlier Metal characters
- Requires the same 25 copies for full promotion
For more on Metal character progression, see our Metal characters upgrade guide.
Other Rare Characters
Challenge Mode Exclusives
Several Challenge Mode characters are rare due to rotation schedules:
- The Joker/Arkham Knight — time-limited challenge
- Deathstroke/Arkham Origins — rare challenge appearance
- Batman/Dawn of Justice — premium challenge character
Store Exclusives
- Arkham Origins Batman — 375,000 Power Credits (most expensive store character)
- The Killing Joke Joker — 60 Alliance Credits (rare currency)
Time-Limited Rewards
- Darkseid/Prime — exclusive to specific events
- Static/Prime — limited availability challenges
Acquisition Methods Ranked
Easiest to Hardest
- Store purchase — immediate but expensive
- Challenge Mode — requires specific characters, free completion
- Daily login rewards — free but extremely slow (80 days for one Gold)
- Phantom Zone — requires event participation and luck
- Nth Metal packs — requires Nth Metal farming, lowest drop rates
Nth Metal Farming
For Metal character acquisition, farming Nth Metal is essential. Phantom Zone events are the most efficient source. See our Nth Metal guide and Phantom Zone guide for detailed farming strategies.
Conclusion
Rarity in Injustice Mobile is determined by acquisition difficulty, not just power level. Metal characters dominate the rarity rankings due to their expensive Nth Metal pack requirements and low Phantom Zone drop rates. The Batman Who Laughs and The Merciless tie for the rarest due to their original release status and high acquisition costs.
For strategies on maximizing your chances of acquiring rare characters, see our Phantom Zone guide. For building teams around these rare characters, read our team building guide.