In the spin-off game Pokemon Ultra Fire Red XD, Anaconduke evolves at level 40 into Ballboa, a Rock/Fighting type. Ballboa was originally planned to be in Clover, but was scrapped. The game's canonicity is debatable, however, as the events of the game take place inside of Kanye's head.
Ballboa is also one of Clover's only region-exclusive evolutions, since it can only be found in KANTOOOOOOO.
It has a huge fist inside its mouth.
Anaconduke is based on various species of snakes, such as keelbacks, rattlesnakes, and trouser snakes. The shiny coloration is based on a tiger.
It is sadly not a reference to "Snake Boxer 6: Now The Snakes Have Fists Too."
Anaconduke is a combination of anaconda and duke, referring to both punching ("duke it out") and its royal status. This is reflected in its Japanese name as well.
The evolution Ballboa's name is derived from ball pythons, boa constrictors, and Rocky Balboa. Word of God states that 'Balbboa' is an incorrect spelling that is only used by idiots. :^)