A whole day without even a guess? Here’s another shot from the same episode:

It’s not from the two latest seasons

Hey. I’m beginning to think you guys don’t think I’m very smart.

Wimmy Wham Wham Wozzle!

Yes

You got it.

No brain slugs, hypnotoads, robot devils, or meteors are involved. Also from the same frame:

From the same frame

No

Yes

It is.

Correct, timestamp 06:22

Understandable, but no.

“But I came here to win :(”

Dingdingdingdingding. I applaud your persistence.

Nope, it’s not from the latest two seasons. Another hint would be that the tentacle marks were caused by octopuses.

EDIT: I believe the correct plural is octopi.

What about now?

Wrong episode but they are tentacle marks.