Donnie had found something mystical with his goggles in a mall that was going to be teared down

Raph: "Donnie, didn't you say you found something mystical here? It's been nearly an hour!"

Leo: "I bet he just wanted to come here for the new animal crossing game."

Donnie: "I wouldn't fake mystical sighting for animal crossing. Besides this, mall is set to be demolished shortly. "

Leo: "No worries, I'll make a portal back to the lair unless Don wants go order a--!" Leo closed the portal