Despite the arms looking similar to Conkeldurr's, the shiny form does not look similar to Shiny Conkeldurr's arms.
At one point, Tripecs was supossed to get a Mega Evolution that looked like a swastika, but then the devs came to the conclusion that Mega Evolutions suck.
It also looks like three Armandos combined, similar to Magneton and Dugtrio. This makes sense looking at how Muscledude was two Armandos combined. It should be noted that the way they meet is the tips of the heads touching. Nothing weird with that.
It is possible that Tripecs may have been inspired in its design by the emblem of the Isle of Man, which is present on both its flag and its Coat of Arms. The arms possibly look similar to Conkeldurr's arm.
Its appearance may also be based on a fidget spinner.
Coincidentally, it also looks like the logo of the electronic music duo "Bicep".
Tripecs is a combination of triceps and pecks, slang for a male's chest area or nipples.