Ok, this is not all that creative, but it deserves mention...
MAGCARGO... @ Leftovers
Bold Nature
252 HP 252 DEF 6 SATK
Base Statistics: 50/50/120/80/80/30
-Wil-O-Wisp
-Hidden Power Rock
-Flamethrower
-Recover
THis little snail is an absolute behemoth, probably the most underatted physical wall in UU. It has the best trait ever;
FLAME BODY which has a 30 % chance of burning the foe. How is this important? Well, there is a certain bug type pokemon in UU... scyther. Magcargo can switch in on any move, and threaten an OHKO with HP rock (100% of the time) That torkoal cannot do without overheat. Also, magcargo has a 30% chance of burning it on the switch, and it resists Areal Ace. Magcargo also owns any Flying/Normal type, swellow included. It can do major damage to them. It also can nail lapras or walrein on the switch for major pain! I wil-o-wisp first turn to catch the "counter" on the switch in. It often nails a poliwrath or a blastiose with permanent burning damage. Also, the slug doesn't die in one hit from weak earthquakes, and it can survive a close combat and burn suicidaly. You can opt for stealth rock if you really want it in there.
Also, it can switch in and recover, something most UU "walls" lack. Recover is great. It can tank hits in this way as the foe succumbs to burn. Although it has less HP than many UU walls, it makes up for it by burning every member of the foe's team, and by being able to recover off damage. Resists Fire(4x), Flying, Normal, Ice, bug and poison... maybe others...
Magcargo=totally awesome. I think whoever wrote the analysis never tried it out... they need to give him some more credit.