Toughness is one of the five main stats in Mortal Kombat Mobile, along with Attack, Health, Recovery and Power Generation. Toughness is the statistic that reduces the damage that a character can take from most attacks, being supported only by fusions, levels, certain equipment, and Passives like Jax Briggs/Heavy Weapons. Sonya Blade/Klassic and her Spec Ops teammates ignore toughness entirely, rendering reduced damage from her and her teammates ineffective.
All characters have a base toughness, which is their toughness at level 1, without fusions and support cards. This ranges from 200 (Lin Kuei, Monk, Oni, Saurian and Shirai Ryu) to 1,630 (Kitana/Ronin). The icon is a Shield, pretty similar to the Shield buff and the Shield Break debuff.
These are the current characters in MK Mobile with the highest toughness (including Fusion X and Level 60). Keep in mind that some of these characters have the same toughness stats.
- Spawn/Tormented Soul: 73,332
- Kitana/Ronin: 61,614
- Jade/Assassin, Johnny Cage/Klassic Movie, Kabal/Black Dragon, Kano/Black Dragon, Kenshi/Ronin, Erron Black/Day of the Dead, Sub-Zero/MK11, Terminator/Dark Fate, Tremor/Black Dragon & Noob Saibot/Darkest Knight: 56,700
- Liu Kang/MK11: 56,322
- Nightwolf/Circle of Shadow: 55,944
- Scorpion/MK11: 55,755
- Jax Briggs/Onslaught, Noob Saibot/MK11 & The Joker/Ace of Knaves: 54,810
- Jade/Day of the Dead, Kitana/Circle of Shadow & Kitana/Day of the Dead: 54,432
- Kitana/MK2 Movie, Rain/MK11 & Sindel/MK11: 53,676
- Mileena/Ravenous, Raiden/Klassic & Goro/Klassic: 53,563