I really think Incineroar would surprise a lot of people who say they’d hate his inclusion.
As somebody who mainly likes Decidueye and didn’t like Incineroar’s design at first, I have to say that Incineroar could not only be a first-time thing for Smash in being a dedicated grappler, but he could honestly be stupid fun. Again, I was initially against him because I thought he wouldn’t be “interesting”, but then I thought of King from Tekken or Zangief from Street Fighter, and realize how fun it could be.
There’s also the image of a huge fire cat just piledriving characters while sounding like Macho Man Randy Savage or Hulk Hogan.
“Listen brother, you better get ready for my Dankest Darkest Lariat." * Proceeds to low-blow the opponent, stunning them.
The amount of suplexing, dirty wrestling, clotheslining, piledriving, submissions, and other wrestling/grappling type moves would be great. I still think my favorite image is Incineroar running at an opponent, and after the player presses A, he basically swings around behind the opponent, grabs them, and then suplexes them Brock Lesnar style.
At least I think that'd be fun.