Shikamaru [Christmas]

Mystery:

Christmas - Shadow binding technique +1[Prompt]: Causes damage and Shadow Stitching to 3 units in the opponent's team, while also removing all Shields and Buffs. Activates the barrier skill Concealed Fortune +1, which lasts for 2 rounds. Whenever a unit under the effects of Shadow Stitching receives Ignition, it will trigger Explosive Manoeuvre.

Christmas - Shadow binding technique +2[Prompt]: Causes damage and Shadow Stitching to the entire opponent's team, while also removing all Shields and Buffs. Activates the barrier skill Concealed Fortune +2, which lasts for 2 rounds. Whenever a unit under the effects of Shadow Stitching receives Ignition, it will trigger Explosive Manoeuvre.

Christmas - Shadow binding technique Y[Prompt]: Causes damage and Immobile to the entire opponent's team, and creates the barrier Concealed Fortune Y, which lasts for 2 rounds. Under the effects of this barrier, Shikamaru's chases can hit your own team, and Shadow Stitching can be inflicted upon your team as well. Friendly units under the effect of Shadow Stitching will not suffer damage when attacking, and will not lose Evasion when attacked.

Christmas - Shadow binding technique Y+[Prompt]: Causes damage, 20 combo and Immobile to the entire opponent's team, and creates the barrier Concealed Fortune Y+1, which lasts for 2 rounds. Under the effects of this barrier, Shikamaru's chases can hit your own team, and Shadow Stitching can be inflicted upon your team as well. Friendly units under the effect of Shadow Stitching will not suffer damage when attacking, and will gain 10% Evasion when attacked.

Standard Attack:

Christmas Present +2: Three ninjas will randomly gain one of the following effects; Mystery Skill cooldown decreases by 1 round, Immune to Debuffs until the end of the round, Immune to Chases and Attacks until the end of the round.

Christmas Present Y+: Two ninjas will randomly gain one of the following effects (Effects are upgraded if the units are under the effect of Shadow Stitching); Mystery Skill cooldown decreases by 1 round, Immune to Debuffs until the end of the round, Immune to Chases and Attacks until the end of the round.

Chase:

Shadow Mimicry +1: Chases and Attacks a Knocked Down unit, causes Immobile and Ignition. Can be triggered twice each round.

Shadow Mimicry +2: Chases and Attacks a Knocked Down unit, causes Immobile and Irremovable Ignition. Can be triggered twice Each round.

Shadow Mimicry Y: Triggered with 20 combo. Chases and attacks 2 units in the opposing field, causes Immobile. Can be triggered twice each round.

Shadow Mimicry Y+: Triggered with 15 combo. Chases and attack 3 units in the opposing field with damage increased by 20%, causes Immobile, 5 combo, as well as increasing his own control stat by 5%. Can be triggered three times each round, and the chase limit cannot be increased.

Passive 1:

Plot +1: Before this unit performs an action, gain 30 chakra. Can be triggered twice each round.

Plot +2: Before this unit performs an action, gain 30 chakra and cause Shadow Stitching to a random unit in the opposing team. Can be triggered twice each round.

Plot Y: At the beginning of each round, causes Shadow Stitching to the unit opposite of him.

Plot Y+: At the beginning of each round, causes Shadow Stitching to all ninjas in the row opposite of him.

Passive 2:

Konoha's Counsellor +1: Shikamaru is immune to debuffs, and when on the field, Konoha ninjas on your team will deal 50% more damage to Ninjas with the Immune to chases status.

Konoha's Counsellor +2: Shikamaru is immune to debuffs, and when on the field, Konoha ninjas on your team will deal 50% more damage to Ninjas with the Immune to chases status, while also doing 20% more damage to units under the effect of Shadow Stitching.

Konoha's Counsellor Y: Shikamaru is immune to debuffs, and when on the field, Konoha ninjas on your team will deal 20% more damage to units under the effect of Shadow Stitching.

Konoha's Counsellor Y+: Shikamaru is immune to debuffs, and when on the field, Konoha ninjas on your team will deal 30% more damage to units under the effect of Shadow Stitching. Shikamaru's chases can't be dodged.

Additional effects:

Shadow Stitching: Whenever units under this effect deal damage, they will also lose 5% of their life. Whenever units under this effect take damage, they will lose 10% Evasion(stackable). Ignores immunity, cannot be removed and lasts until the end of the round.

Upgraded Shadow Mimicry Y+1: Mystery skill cooldown will be reduced by 1 round and the mystery will become unavoidable until the end of the round, Level 2 Immune to Debuffs, Level 2 Super Armor and Shadow Retaliation.

Shadow Retaliation: Ninjas under this effect will be immune to standard attack damage, and if one does target them, the attacking unit will take 10% of their life as damage.

Explosive Manoeuvre: Units under this effect cannot receive shields or buffs, cannot be healed, and receive guaranteed Immobile until the end of the round. Cannot be dispelled.

Honestly, Shikamaru ended up as an option because none of the other unmentioned units in this post seemed very versatile. This style incorporates something different by offering the option of dealing a fair amount of damage by tanking damage, instead of just attacking. Countering evasion and healing is an addition.
As a character, he's got a ridiculous amount of room for possibilities, but all of his versions end up sort of the same, and unused.

Maybe changes similar to these could make a fan favourite character actually shine at long last.