"Then the feet starting getting itchy, going to these shows and watching everyone else fight.
"Everyone at the gym uses the song I had - Here I Am/Small Axe by UB40 - and every time I heard it come on it just gave me that feeling. I just thought 'Nah, I'm jumping back in'."
The tournament pits New Zealand and Australian fighters against each other in a transtasman showdown.
Kara enters with a nine win-six loss record, with Pahi at 9-3.
Fights consist of three three-minute rounds under K-1 Kickboxing rules.
If both progressed to the final they would have to do battle with each other, Kara said.
"That is something we've had to come to terms with over this training camp.
"It's not very often you would have to fight one of your stablemates, but I think King in the Ring is one of, if not the only, exception.
"I'm excited and ready. The body is feeling good and I'm in a great space. I just want to get up there and get to work."
Kara and Pehi fight under K-1 and Muay Thai rules.
"A lot of big names have come from that promotion and a couple of former Kings have moved on to UFC [Ultimate Fighting Championship] contracts, like Israel Adesanya and Dan Hooker."
Former Whanganui resident Adesanya claimed the King in the Ring title three times in two weight divisions.
He is the current UFC middleweight champion.
"For me, I'm more about stand-up striking, so I would be more interested in going to something like One Championship or other kickboxing promotions," Kara said.
"You've just got to treat your next fight like it's your last fight. You can't think too far ahead."
Whanganui cruiserweight fighter Haimona Tamati will be the first from Whanganui to attend the World Kickboxing Association World Championships when he makes the trip to Wales in November.