This episode's guest star appears to be Toge Sohei, the protagonist of THE THREE ADOLFS.
"Albatross! Albatross! Al-ba-tross!"
Later, Mars goes to visit Joe:
He begins to tell Mars his history:
I am just guessing that he might be a cyborg, otherwise why the protection suit?
At center, Dr. Yamanoue, to his right, Tick & Tock.
The Yakuza boss is modeled on Edward G. Robinson, I presume.
Facing the boss are the three locks hair guy from The Chronicles part 1 (there named Joe), Norse Necktall, & I cannot identify the guy at far right.
[Plink]
"Throw the fight!? Joe would never--"
The bird is one Joe kept as a pet; it was frightened by Mars' outburst.
Mars & Joe happen to meet on a field, then, I assume because Joe realizes that Mars' holds him in high esteem, & Joe wants to save him from the same fate:
As the serpent robot bops Joe, he apparently remembers being knocked out in a fight.
Finally, Joe finds an honest way to make a living.
Off to school!

