In Clash Royale, the Lava Hound is a unit that only targets buildings. With a short range and high HP, the Lava Hound will burst into 6 smaller units, similar to Golem units with the exception that Lava Hound is a flying type unit. This effect could be in Mini since there's a K.O ability so this unit might work like Giant Skeleton but spawns units instead, which can potentially disrupt the enemy's targeting.
Bandit
Bandit is a melee unit that has a dash that can help her reach an enemy quickly and deal some damage, avoiding all damage taken during the dash. This effect could potentially be in Mini since it could either be a clash ability to teleport to the closest enemy, or a super that works like Countess.
Night Witch
Night Witch is a melee unit that can spawn smaller units during battle. It's safe to assume that she will work similarly to the Witch because their effects are similar. She may also get a K.O ability as an upgrade that can spawn bats when defeated.
Mother Witch
Unlike the other Witch type units that spawn smaller units, the Mother Witch makes turns defeated enemies into a hog that will fight for you instead. Mother Witch's attack places a curse on the enemy for a few seconds, and will only turn into a Hog when defeated with a curse, so she doesn't have to land the kill herself, making it a lot easier to use.
Bomber
Bomber is a unit that deals splash damage per attack by throwing bombs. Potentially added to Clash Mini as a low cost ranged unit to deal with multiple enemies if they're grouped.
Skeleton Dragon
Skeleton Dragons are a 2 unit in 1, both are flying and ranged that shoots out fireballs that can deal damage in an area. Potentially added to Mini once flying units are added in the game.
Goblin
Goblins are the basic melee low cost unit that exists in other clash games. They don't have any specialty, but they can often be deployed in swarms due to their low cost. If it's added to Mini, the goblin might have unique abilities or serve as another alternative to a low cost unit.
Bat
Royal Recruit
Royal Recruits are multiple units in Clash Royale. Only having medium damage and HP, each recruit has a shield to get some temporary HP. This could work similarly to Skeleton Guard as a super ability if it were to be added to Mini.
Royal Giant
In Clash Royale, the Royal Giant is a unit that specializes in destroying buildings with his giant cannon. His size makes him a slow and tanky unit, but he provides good single target damage with a purpose. He's a unit that can be added to Mini as a powerful and tanky ranged unit with a focus on his cannonball having unique properties.
Goblin Gang
This is a group of Goblins in Clash Royale, spawning multiple Goblins with knives and spears. They have short range and low damage, but are a good one to bring out to focus down an enemy that has no splash damage. It's unsure how this will work in Mini if it's added.
Elite Barbarian
In Clash Royale, this spawns 2 Babarians which are upgraded versions of the regular Barbarian. If it's added to Mini, this unit may only be just 1 upgraded Barbarian that has higher Elixir cost, with stats in between the low cost Barbarian and the Hero unit.
Royal Hog
Royal Hogs are groups of units in 1 in Clash Royale. They are speedy units that focus mainly on targeting buildings, making them good to bring out when you need to rush down a base. Since there are no Hogs in Clash Mini, it is unsure what their unique properties will be in the game.
Wall Breaker
Wall Breakers are skeleton units that carry a barrel bomb. They are building focused units in Clash Royale that will run to the enemy base to explode the barrel and itself, dealing a lot of damage in the process. This unit could be added to Mini as a single use unit with a clash effect or a super ability to throw a bomb.
Goblin Giant
Tanky, slow, and resilient like other giant units, this one comes with 2 spear goblins on its back, which can also attack from a short range to nearby enemies. On death, the goblins will drop down and become smaller units. Potentially added to Clash Mini as a tank that can spawn goblins from a K.O ability.
Yeti
Yetis are a troop type unit in Clash of Clans. Having decent health and damage, they come with a unique ability to spawn Yetimites after receiving a certain amount of damage or after death. Potentially added to Clash Mini with that passive or a K.O ability to spawn more units.
Dragon Rider
In Clash of Clans, the Dragon Rider is a speedy air troop that mainly targets defensive buildings. With decent HP and damage, it's a single target damage dealer that attacks enemies by spraying fire. Since it doesn't have a unique specialty, it is unsure how it will work if added to Clash Mini.
Dragon
Dragons are powerful troops for destroying buildings in Clash of Clans. They have good damage and HP and their attacks deal splash damage, making them great for sieging enemy bases. Dragons could be added to Clash Mini since it's iconic, but no information on how they will work.
Headhunter
The Headhunter is an assassin type unit in Clash of Clans, focusing on taking down other heroes in battle. They have the mobility to jump over walls and inflicts a slowing effect on attack. It has a niche role, but could exist in Clash Mini to help deal with enemy Hero with a slowing attack as passive.
Rascal
Rascals are 3 units in 1 in Clash Royale, spawning a melee and tanky boy in front with 2 ranged damage dealers just behind, which provides decent Elixir efficiency since it deploys multiple units at a time. While there aren't any units like this in Clash Mini, it could be added into the game as a star upgrade to add an extra unit during the battle.
Battle Ram
Battle Ram are 2 Barbarians that carry a ram that can deal high damage to a building in Clash Royale, then becomes 2 Barbarians that fight with swords. This effect could work as a clash ability in Clash Mini similar to Prince, so it has the potential to be added to the game.
Flying Machine
Flying Machine is a basic ranged damage dealing unit in Clash Royale, having decent range and speed but low HP. With no other specialty other than being a flying type unit, it can serve as an alternative to another low cost ranged damage dealer.
Zappies
A structure type unit in Clash Royale that can attack 3 enemies at a time, dealing low damage but stunning them briefly on each hit. While there aren't any structures in Clash Mini, this can still be potentially added but the effect becomes a super ability or activates as a trap when enemies get close.
Sparky
Sparky is a ranged structure type unit that can deal very high damage with a wide splash effect, but low speed. It charges up like a cannon before shooting out a projectile, pushing Sparky itself back a bit after each hit. This unit could potentially be added to Clash Mini as a powerful super ability, or slow attack speed like Magic Archer but has splash damage instead of pierce.