Nominating Stunfisk for D-Rank
Stunfisk actually has a weird niche on certain offensive teams due to its ability to check offensive flying and electric types, which tend to be big issues for offense teams, while doing rocks, and not losing momentum. I actually got my reqs with a stunfisk team (
http://pastebin.com/hcGpmRd3) so let me try and explain wtf goes through my brain.
When I build offense, two of the things I like to have checked are offensive flyings, and offensive electrics. Both of these types to have fast, hard hitting, non choiced mons, that can shred through unprepared offense builds. Electric has Raikou, Thundurus, and Mega-Manectric, and Flying has Tornadus-T, and Talonflame. Lord Fisk happens too, by virture of its typing and bulk, hard counter both of these groups of mons extremely effectively. I don't think I need to post calcs to show that it beats electrics and flyings, but Earth Power is like a roll to one shot Mega Manectric, two shots Raikou, and discharge two shots Thundy after rocks or when factoring in LO damage. All of these guys Hidden Powers 3hko if you run an appropriate amount of SpDef, also, you cockblock them from volt switching and turn usual momentum gainers into huge losses of momentum. Torn-T and Talonflame can't really touch you, will eventually get static paralyzed if they want to spam U-Turn and Brave Bird on you respectively, and are two shotted by your Discharge/Thunderbolt, while like, 12hkoing you back. Talonflame can try to play mind games with Roost if its SpDef, but eventual paralysis and Earth Power kind of craps on that.
You get free turns against all the electrics and flyings to set rocks down, unless they double out (which i can almost assure you wont happen the first time you send fisk out because no one knows what the fuck Stunfisk does), and you can't really Spin or Defog on fisk due to Yawn, which is basically your ghetto phasing move. Yawn is actually kind of important, partly because Fisk has nothing better to do with its time, and partly because it prevents set up and prevents spin/defog dudes from sitting in on you. It also forces switches, which is always nice on your rocks dude.
Even though hoping the opponent has an Electric/Flying is kind of match-up reliant I guess (although add up the combined usage of Torn-T + T-Flame + Raikou + Thundurus + Mega Manectric and Fisk is live the vast majority of games), it has really fucking nice mixed bulk and you can just lay rocks down and sack it if you don't need it. While I'm aware saying that a mon is good death fodder is a pretty shit argument, Fisk has the distinction of being particularly good death fodder due to a combination of paralysis chance from discharge/static, its mixed bulk meaning you're very rarely even 2hkoed, so you can pump free damage out, and only fitting on offense which is a playstyle that needs to fodder at least one dude every game anyways.
I'm a retard and forgot to save Fisk replays from laddering, but other people uploaded some. I don't vouch for the quality of them, but hey, you guys like replays, so here.
http://replay.pokemonshowdown.com/oususpecttest-235261959 (opponent has talon and raik and fisk goes off)
http://replay.pokemonshowdown.com/oususpecttest-235134049 (yawn prevents zap from defogging fisk rocks which lets me win the game !)
http://replay.pokemonshowdown.com/oususpecttest-235335251 (finals of an ou room tour against I ABR I, i play like a retard, but its easy to see what fisk is meant to do)