The 21-year-old joined four other New Zealand players who have won the tournament, which has been running for seven years and was held in Sarasota County this year.
Franks agreed the sport was stereotypically seen as an older person's sport, but he wants more young people to give it a go.
"I think you'll find us young people hit a lot harder and that makes the game more exciting. The sort of shots we pull off makes the game a lot more fun.
"When you start playing at a high level, it's really quite entertaining. It puts you in high pressure situations. It's what sport is all about. If you can play with your friends, that social side of it is really good as well because you don't have to be any good at it to go out there and have fun."
For 19-year-old Mattie Clarkson, being able to befriend people of all ages was a bonus to the sport.
"I enjoy playing sports, and I've always grown up around older people. So over the years I've sort of adopted a lot of aunties and grandmas and grandpas. They've all encouraged me to keep playing. I've made a lot of friendships as well. So that's probably what kept me going at it."
It was 19-year-old Luke Francis's first time at the world championship, and he said the pressure has pushed him to play better.
"I've won three out of my five matches so far, and got one left to go tomorrow. Pretty happy with how I'm playing. It's definitely nerve-wracking, lots of pressure when you're on the court. I'm enjoying the opportunity."
A croquet game can be lengthy, ranging between 40 minutes to a mammoth five hours. While it doesn't look like a sweaty sport, Francis, who used to play rugby, said it was still exhausting.
"In terms of adrenaline rushes, you might tend to tense up a bit, I personally would try and sit back and mentally reset myself so I'm not all tense and I can just take the shots and relax. You can't help but get tensed up a little bit sometimes, that's where coping with pressures is good because you can utilise it and play even better under the pressure."
At his second world championship, 20-year-old Callum McKinnon explained how he kept his cool and how he reset in between games.
"Today is a good example for myself. I played a game which was two and a half hours this morning and another game which was another three and a half hours this afternoon. It can be a pretty long and tiresome experience.
"I personally try to listen to music that lets me forget about what has happened in the last game as much as I possibly can. Get some food, get some fluids up and energy and all of that. You're just trying to think of the next one rather than anything that's happened in the past."
Different takes on good players
For Franks, tactics were the key.
"I think what makes a good croquet player is having a good understanding of the tactics of the game, that is about half of what the game is. You need to be good at tactics if you want to compete at a high level and also you've got to have a good different range of shots that you can pull off. So you'll find a lot of players, who are either really good at just hitting hard or they're really good at a more mid-paced type of shooting. But if you're more balanced and can sort of hit all of these types of shots, I think you'll find that you can be a much better player."
McKinnon said it was dedication.
"I think it's someone who's committed to the game. Someone who's willing to go down pretty often to a club and hit balls and hit balls with anyone, even if it's just by themselves and just the time and the practice and all of that. That really makes a good croquet player."
For Clarkson, it was about the journey.
"Having a positive attitude. If you go into a game wanting to have fun and just giving it your best shot, I think that'll help you to not only win but have a good time as well."
For Francis, it was all handling the pressure.
"It's composure, and being not just good but better under pressure. In croquet a lot of shots are really significant to the outcome of the match, so it's a lot of pressure and being able to deal with that is pretty essential."
