It's Mr. Jenkins the caretaker!
2 seconds sound clip from Scooby-Doo, Where Are You! - Foul Play in Funland (S1E8).
You can hear this line at 00:18:47.109 in the Blu-ray version of the episode.
Quote context
[...]
- We got him trapped! We got him!
- Uh-oh. Like, you won't believe it.
- You are absolutely right. He's not human. He's a robot.
- It's Mr. Jenkins the caretaker!
- He's Charlie... the world's most perfect robot. I programmed him to operate everything in Funland.
- But why?
- I wanted to make enough robots to run the whole park.
- But what happened? Your robot's been tearing up the place.
- Somehow he got out of control, but we can stop him if you kids will help me.
[...]