Combo!

With the Repairman:
Implausible Ricochet – Shinko fires a bullet at a metal plate the Repairman holds up. The force of the shot causes him to spin, smacking any nearby enemies. The bullet itself bounces around until it hits something.

With Marie:
Trenchcoat Special – Marie lifts Shinko onto her shoulders (for want of a better term) and shields them both in a trenchcoat, which hides a variety of tools and weapons. They are practically one stronger character for the purposes of the battle (combat prowess of Shinko with evasiveness and defense of Marie), and when this “one” is defeated, they resume combat as normal separate characters.

With Cat Slime:
Cheer – These two adorable characters pose, dance, sing, and otherwise motivate their friends, while distracting and momentarily stunning enemies.