Robtish is a Scottish accented Nighlok debuting in the Power Rangers Samurai episode "Test of the Leader". He is voiced by Peter Daube.
He has 2 squinted eyes and red skin. He has a helmet with spikes and a fierce grin with fangs. He also wields a sword. His upper body, which resembles an angry beast, is based on the Otoroshi (おとろし?). It is also stated by Octoroo that all the other nighlok are afraid of him.
He returns in the next episode, "Jayden's Challenge", in which he is ready to defeat him. He is destroyed though, and summons some Flying Moogers into action and is destroyed a final time by the Samurai Battlewing Megazord's Megablade.
In the episode "Party Monsters", he is among the deceased Nighloks attending the first ever Nighlok afterlife Halloween party in Nighlok Heaven.
- Robtish is the second villain with a Scottish accent, the first being Klank from Power Rangers Zeo. However, due to their supernatural origin, neither of them are actually Scottish.
- His counterpart in the Super Sentai series that Samurai was based on is Ushirobushi.