We've had our fair share of dinosaur-based Pokemon, but none come even remotely close to the mighty Tyranitar. First introduced in Generation II, he was a tough one to catch and train, but it was well worth the effort. To this day he is the mainstay of my current team.
Unfortunately he is one of the harder Pokemon to obtain, as Larvitar (his base form) is usually only available late in any game it's featured in. Nevertheless, it's definitely worth training one!
Once again, not a huge fan of his Mega Evolution, but that's why they're optional! Also he looks like Godzilla!
For years Charizard and Gengar were my signature Pokemon partners, but I've gotta give it to the big guy. Tyranitar is my absolute favorite Pokemon (out of 720!), and I'm looking forward to my next round of adventures with him!