Making a custom doll of a wrestler is a fun and creative idea, especially for a wrestling fan or lover of wrestling collectibles. Most of the time, to start making a custom wrestling figurine, you would need to:

1. Choose the Wrestler: Pick out the fighter that you want the pop-up to look like. Someone who is well-known in the wrestling world, liked in the community, or a wrestling fan could be the person.
2. Find a Custom Bobblehead Maker: There are a lot of companies online that make customized bobbleheads. You should look for a dependable company that can make bobbleheads from pictures or detailed details.
3. Provide Detailed Specifications:

Images: You must send in clear, high-resolution shots of the person from different angles if you want the doll to look like that person. For a famous or common fighter, you might not need personal photos. Instead, you might need a detailed account or reference photos.

Costume and Equipment: List the wrestling gear's colors and any drawings or names that are on it. Think about the wrestler's belts, boots, and other gear as well.

Pose: Choose a position. It could be a signature move, stance, or any other pose that shows what the fighter or the sport of wrestling is all about.

Size: Custom bobbleheads usually come in heights between 5 and 7 inches, but some sellers offer a wider range of sizes.

4. Review and Approve the Proof: Most companies that make unique bobbleheads will give you a sample or mock-up of the finished product so that you can approve it. Now is your chance to ask for any changes or tweaks.

5. Production and Shipping: Once you agree to the design, the company will make the doll and send it to you. Production plans can change, so make sure you order a lot of time in advance if you need it by a certain date.

Remember that the details make a great handmade wrestling bobblehead. This means that the more exact you are, the better the end product will look.