Legendary Immortals! Introductory exam of fear is the twenty-first episode of Zoids: Wild. It first aired in Japan on November 24, 2018.
Overview
Resuming where the last episode left off, Team Freedom seek out Bacon's old master.
They take a ride with Sanratan, who believes the Zoid Hunter to be some kind of dashing knight. As they arrive at the location, they find nobody there.
Eventually, the group finds him, and much to the chagrin of Sanratan, he turns out to be an ugly old man. Regardless, Team Freedom press on for training. The master agrees, on the condition they provide him with "ecchi" material. Arashi goes through Onigiri's backpack to find some (which he doesn't have) and a fashion magazine of Penne's falls out. The man takes it agrees to train.
He's a spritely man, moving faster than the eye can track. His Zoid, the Gusok, also proves to be extremely nimble.
Much of the episode is the team trying to catch him, and failing at every opportunity.
As Arashi presses on, citing revenge for Bacon, Arashi states Bacon was felled by Gallagher. In a twist, it's revealed that the master didn't just train Bacon, but also trained Gallagher.
In fact, Gallagher and Bacon were close friends at one point.
Eventually Arashi and the team use their Wild Blasts and a trap set up to pin the master. They fail to capture him, but succeed in proving their worth. The episode ends as he agrees to train them.