Yellow Diamond (Adam,s speed chalenge)

Description
The penultimate boss of Adam,s speed chalenge. They are called "Yellow Diamond" instead of "Yellow Active" because they are yellow and to avoid confusion with Red Active. It is unknown if Yellow Diamond is a creature, a mineral-turned-living, etc., but I will be using "they/them" to refer to them, just in case they are sentient and also exist irl.

It is assumed that Yellow Diamond is antagonistic due to the fact that it kills you on contact. However, since it is an easier battle than Red Active, while it is unclear as to what kind of antagonistic force Yellow Diamond is (rival, major henchman, fake main villain, etc.), it is clear that they are not the main antagonist.

Trivia

 * They exist dangit
 * They are fought immediately before fighting Red Active in Adam,s Speed Chalenge. The reason for this peculiar design decision is unknown, even to Adam M.
 * They are not the main antagonist of Adam,s speed chalenge.
 * Their only appearances in the series thus far are in Adam,s speed chalenge and in Sandwich,s Speed Challenge: Speed Kills.
 * actually they appeared in Adam,s speed chalenge 3: Doh it Again(st Hostilef Forces) as well
 * They also showed up to the family reunion, but be honest. You didn't even realize they were there, did you.
 * Their fate at the end of Adam,s speed chalenge is unclear, but due to a lack of further appearances aside from Sandwich,s Speed Challenge: Speed Kills, it is currently assumed that Yellow Diamond was permanently destroyed at the end of that game.
 * actually they appeared in Adam,s speed chalenge 3: Doh it Again(st Hostilef Forces) as well (but then immediately died again, so what gives??)
 * actually they appeared in Adam,s speed chalenge 3: Doh it Ag
 * actually