The Asset is preparing for this weekend's Players Championship Finals in Minehead and first-round opponent Ronnie Baxter might have to watch out when the grappling fan gets his "adrenalin kick".
"I do grab inspiration from wrestling because it just gives you the willingness to succeed," Nicholson, who will walk to the ring with TNA's Bobby Roode at the Nottingham Arena in January, told sportinglife.com.
"It gives you that little bit of an adrenalin kick which sometimes when you are under pressure you do need.
"In this game if you watch it over the last 15 years the one thing that's changed is the sheer aggression in the game.
"All you've got to do is watch Michael van Gerwen play these days and you think 'my god, you are in a war with him'.
"That's the way has become and I think that's for the greater good of the sport because essentially it's one person versus one person and it is a war up there.
"It is a lonely place but I tell you what it is a very entertaining war."
Nicholson failed to get beyond the group stage of the recent Grand Slam of Darts but he is feeling good as we near the end of a season that has seen him reach the final of the World Cup - with Australia team-mate Simon Whitlock - and Dutch Darts Masters.
"At this point in time I'm feeling very chirpy which is quite unusual for me.
"I'm actually feeling very good and looking forward to the Players Championship.
"That will kind of tell me where I stand form-wise and the good thing is if it's not a good performance then I can tweak it for the World Championship a couple of weeks after that.
"It's a massive push to see if I can end the season with a bang so it's pretty exciting stuff."
Darts legend Eric Bristow, currently in Australia for TV show I'm A Celebrity... Get Me Out Of Here!, has been embroiled in a row with Nicholson this season.
The Asset called Bristow a "dinosaur of a dart player" on Twitter after criticism from the Crafty Cockney but now he's trying to move on from the row and concentrate on what happens the oche.
"Eric's had a few negative opinions about me this season and at first when I heard about them they were pretty hurtful.
"I've never really done anything bad to Eric. I may have made one of two choice comments but that was in reaction to what he said to me.
"I've spent time with Eric and I don't mind his company. He's sometimes a bit brash but there are a lot of people in darts who are like that.
"It's disappointing when you hear somebody like Eric having negative comments about you but it's my career and it's nothing to do with him.
"I've got to block that out and play my own stuff."