It is I questiony the question mark.

I help with the shack, I'm very big brain and hope one day they'll take in my ideas maybe run the shack one day yknow

Dipper: @Dipper-Pines-

"Suggestion to improve the shack once. I had this idea where I could be like the mystery shack mascot. Questiony the question mark. I ask people questions yknow do the question dance" -Soos