Cruncher
Sold by Angelo Rustbin. The itchy legs! The wiggly antennae! Okay, fine, he's not cute. But he's trying! Critter type. You can get in exchange for 1x at S.C.R.A.P. Exchange vendor in (he's also also the vendor for the ).
Obtain 
Cruncher by trading a Vintage Kaja'Cola Can to vendor Angelo Rustbin in Undermine.
Guide awaiting review
Reach Renown 14 with S.C.R.A.P.
Participate in S.C.R.A.P. jobs by first unlocking the "Scrappy S.C.R.A.P.per I" perk at Renown 2, then continue participating in jobs until you reach Renown 14 to unlock Vintage Kaja'Cola Can as random loot while Shoveling Trash and as rare loot in progress-based reward containers.
Trade for Cruncher at vendor
Visit Angelo Rustbin at 25.6, 37.4 in Undermine and exchange your Vintage Kaja'Cola Can for Cruncher at the S.C.R.A.P. Exchange.
Tips
Cruncher is cageable and can be bought and sold on the Auction House.
