Machamp?

I powered up a KC/Sub Machamp to 2500cp and probably the best way to describe it is 'not awful'.

It does break up optimum use of attackers (and most attackers probably don't instantly recall it's type weaknesses). Submission is an annoying and confusing animation, particularly with dodgy network connections/slow phones.

Hit him with a strong non-SE attacker and yes he'll eventually be punished, but will do a reasonable amount of damage back in the process.

Mine has lasted almost two weeks in one mixed gym, but I suspect that's as much the fact that it was a mixed type gym more than his individual contribution.

With the amount of psychic types running around, I really wouldnt recommend it. He has good stats but his quick attacks are both really crappy.

Poliwrath with the same CP would be a much better fighting type defender imho.

Nope don't bother. Everyone has a pidgeot and most have a psychic

I'd say no. At one point I ended up having my 1200 ZH/P Exeggutor take down 3 Machamps on his own during a training run. If my memory serves me well, they were 1600, 1800, and 2200.

The only Machamp I ever powered up was my 100% that came with Karate Chop and Cross Chop. And even at level 39, he's pretty garbage, though usable against Lapras (I'd still rather bring Alakazam and make some effort to dodge)

Unless you really like Machamp, he's not worth powering up at all.

Machamp looks cool, but that's it.

-or-

"Machump"

I'm gonna go against the grain here and say yeah, power it up if you have spare stardust. With that moveset it's actually a pretty good defender (decent stamina and no double weaknesses), and most importantly you can get it to really high CP and use it to add variety to high level gyms. That's gonna make them more interesting and harder to beat, plus many here seem to forget that not every player plans his counters for every battle, or actually knows what to use against a Machamp.