Rampardos, the Head Butt Pokemon. Its skull is as hard as iron. It is a brute that tears down jungle trees while catching prey. Its powerful headbutt has enough power to shatter even the most durable things upon impact. If two were to smash their heads together, their foot-thick skulls would keep them from fainting. Due to the thickness of its cranium, its brain never gets the chance to grow.
Rampardos is anythin' but a rampart; rather, he likes t' tear 'em down with that monstrous attack; but that nonsense is for the competitive section. Based on the Pachycephalosaurus, it's origins aren't exactly exciting and it's design, as well as dull Rock typing, keep it from bein' extravagant or particularly interesting... with that said, I think the simple design Trollfreak went with, as well as Rampardos' equally simple color scheme, are executed well. I like it's desgin somewhat, not that I care for the lore behind it all.
I do have fond memories usin' one though, let me tell ya. I'd only just discovered the hidden numbers 'n equations of Pogeymanz in '06. My first "competitive" team for DP in '07 had a Rampardos on it. The unparalleled strategy? ... Use a Ninjask with a Focus Sash and Protect t' throw up Swords Dance and +2 Speed, Baton Pass t' somethin' else that further increased Attack and Speed, then Baton Pass t' Rampardos to sweep.
... It didn't ****in' work. I was so bloody disappointed when my first Wi-fi battle on Battle Revolution was such a blatant failure. Rampardos missed it's very first Stone Edge and was OHKO'd by it's foe. 'Least my first competitive team was an attempt at somethin' interesting... Back to the drawing board I went. Thus, I never used Rampardos again. But 'ey, t'is a memory I won't forget any time soon.
In the competitive venue, Rampardos is as the above illustrates: a glass ****in' cannon. Hit things hard before you're hit hard because of your shit defenses. Before DP's release, Rampardos was predicted to be one'a the most monstrous of beasts that would tear OU apart whenever given the chance. He fell very short of that prediction to say the least. A Choice Scarf gave 'em acceptable speed, but only with a Jolly nature, leaving 'em at the not-so-blistering 429 Atk maximum. Bad defenses, acceptable speed and really good Attack don't make for much of a threat on it's own. Rampardos needed to either Rock Polish or get Baton Passed some Speed/Trick Room to do the serious damage it has the potential to inflict (in the latter case, Marowak is often preferable anyways). With the inability to do all-that much on it's own besides smashing anythin' really slow, it was relegated to UU as a result. Where it's Base 165 Atk is downright terrifying and will make any Poke Sludge Bomb their pants if they're without a 4x Rock resist. Oh, and Platinum gave Rampardos absolutely ****-all.
Come BW, Rampardos actually drops another tier due to the immense power shift both OU and UU experience; it's gigantic Attack wasn't that gigantic in BW UU. In NU however, it damn-right it. As mentioned above, the only thing Rampardos can reliably do on it's own is ram it's head into bulky, slow targets... Which it still does quite well, if not better in his new metagame. It didn't really receive any new tools, but it doesn't need anything besides it's ginormous power to do it's job anyways. It also quite hilariously can utilize it's Dream World ability Sheer Force, as well as Special attacks to do away with Physical walls that might annoy it: namely those pesky Grass types. Considering how huge it's Attack is even when uninvested, Head Smash still smashes things into pieces even when it's SpA is the only attack stat gettin' bolstered. As a result, if for some reason Rampardos can't break everythin' through brute force, it can instead lure in Physical walls and troll 'em with a super-effective Special Attack. Rampardos does TyraniBOAH proud.