A man has claws which come out of his hands, no blood is shown however because the character can instantly regenerate the injury caused by the claws coming through his skin.
A boy kills a man by stabbing him with his claws.
Several scenes include Wolverine and Sabretooth killing the enemy in war with weapons, including guns and their claws.
A man is put into a chamber filled with water and has several needles placed into his body, including his face. No blood is shown. This is brief and not graphic.
Though there are several fighting scenes, little blood is ever shown throughout the movie.
On several occasions, Wolverine kills people by fatally wounding them with his claws.
A man fatally injures another man by stabbing him with a large piece of sharpened metal.
In a battle scene between Sabretooth and Wraith, we see Wraith teleport around Sabretooth while repeatedly punching and kicking him. We see some blood on Sabretooth's lips from getting punched in the face. Sabretooth tricks Wraith into teleporting and impales Wraith's body on his arm. We see Wraith trying to teleport repeatedly, during this time we can see very brief glances at his insides, like an x-ray, and can see that Sabretooth is holding him by his spine. In a quick scene thereafter, Sabretooth's breaks Wraith's spine. We see blood come out of his nose and mouth and see his eyes roll back up into his head as he falls to the ground. We later see some blood on his shirt and on Sabretooth's hand.
There are several hand-to-hand fight scenes.
One of the characters fights with two katanas. We see him deflect bullets and slice people, with minimal or no blood.
One character kills an "innocent" man with his bare hands.
A man tries to kill another man by shooting him with special bullets, we see him get shot several times in the chest, and then repeatedly in the head at close range. Minimal blood is shown and we see fragments of his metal skeleton exposed through his skin.
After Wolverine emerges from the tank he had the adamantium injected into him with, he is shot several times by Zero. We see the bullets hit him and see bloody impacts on his skin, and watch in somewhat slow-motion as the bullets are pushed out of his skin and the wounds heal.
The climactic battle between Wolverine, Sabretooth, and Deadpool is very violent. The characters repeatedly cut, slash, and stab each other, showing bloody wounds. On several occasions, Deadpool impales Wolverine on his swords and we see dripping blood. Wolverine finally beheads Deadpool, and we see his head fall off of his body with minimal blood.
After managing to bring an entire helicopter down, Wolverine strikes his claws against a rock to ignite gasoline leaking from the helicopter. We see the helicopter explode and any survivors of the initial crash are presumably killed in the explosion.
The character, Zero, is a marksman and, as such, shoots multiple people by dual-wielding two pistols. In a later scene, he shoots a woman with a high-powered sniper rifle. Another man is shot multiple times by the rifle, but we do not see any blood.
The character, Cyclops, can shoot high-powered infrared blasts out of his eyes. In one scene, he fires a blast at a group of enemy soldiers, we see them get blown away in a large red explosion. No blood is seen.
Stryker has given Deadpool the ability to replicate the infrared blasts that Cyclops can shoot out of his eyes. In several scenes, we see him shoot Wolverine and Sabretooth with these blasts, leaving burn marks on their skin, which heal up quickly due to their healing abilities.
During the war montage, Sabretooth bursts into a shack with a Vietnamese woman over his shoulder and throws her against a wall, then to the ground; the implication is that he intends to rape her.