Not an actual bot, but

When you see Shrimps, they are a blue kind of color, however, when Shrimp is cooked it starts turning red-ish pink!

Now, look at Shrimpo...

HE'S RED-ISH PINK! so, My silly headcanon is just shrimpo was created, then thrown onto the stove turning him red-ish pink then he was put with the other toons

If you for some reason want it to be angst, you could say shrimpo was in a lot of pain when he was getting cooked and now has PTSD of stoves