Acupuncher is the Omnitrix's DNA sample of a Pseudaus Medco from the planet Maska.

Height - 7 Ft Body - Humanoid

Photographic Reflexes - Acupuncher can instantly replicate the physical movement of anyone after seeing it performed once, including acrobatics, martial arts, and other physical stunts. Meaning he can become an instant master at any form of martial art (human and alien), marksman, and athletic ability.

Spike Generation - He can grow and retract his spikes at will, as well as being able to shoot them as projectiles or break them off in order to use them as weapons.

Enhanced Condition - Combining his photographic reflexes with his enhanced strength, speed, reflexes, agility, equilibrium and his prehensile feet make him an incredibly proficient fighter and warrior.

(These skills are stored within the Omnitrix, so when Ben transforms back to human, he will have the moves he learned before hand once he transforms into Acupuncher again, therefor he can build on them)

Body Limitations - Acupuncher cannot replicate superhuman abilities, he is only limited to the potential of his own body.

Visual Lock - He needs to visually see the movements of whatever he is copying in person, so seeing on a television for example doesn't count.