It's possible:
* The name is misspelled. Double-check the spelling and try searching again.
* He works under a different name. Perhaps he uses a stage name or initials.
* He's primarily involved in smaller projects. He might not have been in major blockbuster films or television shows.
To help find information, you can try:
* Searching for "Jim Topper" on IMDB or other movie databases.
* Looking for voice acting credits for shows or games.
* Checking online fan forums or wikis dedicated to specific genres he might work in.
Let me know if you have any additional details like his profession, specific genre, or any other information you can remember. I'll do my best to help you find him!