This is very interesting! I'm going this completely blind without reading any other answers or checking the wiki.
Who has been in the most character battle matches? (Link | Cloud | Sephiroth | Solid Snake | Samus) My gut reaction is Sephiroth because of Villains, but I know he got retired after that so he's effectively missing a couple contests, so I'm thinking it has to be either Snake or Samus. I feel Samus gotten further overall than Snake (Snake did better in 2008 but he was weak in the first couple contests + Samus did better in 2018), so Samus is my answer.
Link has the highest single match vote total in contest history (oddly enough, in a fourway match). Who is second? (L-Block | Cloud | Zelda | Draven | Samus) Guessing it's L-block's 2007 finals run? Draven's 2013 run should be very close as well, but siding with L-Block for now
Which non-Noble Nine member has received the most total votes in contest history? (Bowser | Squall | Ganondorf | Ryu | Kirby) I really have no idea. Squall's historically the strongest of these bunch and I think pre-2013 has had a decent amount of success so I'm rolling with him. Meanwhile, Bowser, Ganondorf, Kirby, etc I think have been in a bunch of SFF/LFF matches that should sap their total votes (Link vs Ganondorf 2004 lol).
Which franchise has been in the most character battle matches? (Sonic | Mega Man | Pokemon | Chrono) Pokemon's the tempting answer because it probably is true since 2010, but it's missing a lot of matches in the early contests. Sonic has (Sonic/Knux/Tails/Shadow). Chrono has (Crono/Magus/Frog). Mega Man has (Mega Man/X/Zero). Ugh I'm sticking with Pokemon here just because of 2013 and how far many of its entrants go.
Which of these Final Fantasy VII characters has received the most total votes? (Aeris | Tifa | Vincent | Zack) Feel like its either Tifa or Vincent. Going to roll with Vincent here, but not very confident
Which contest gathered the most total votes? (2003 | 2006 | 2007 | 2008 | 2010) Guessing either 2007 or 2008
Which winless character has gathered the most votes? (Guybrush Threepwood | Ramza | Kratos Aurion | Cecil | CATS) Cecil's probably the most legit now, but he's legit in an era of low votals. I'm... going with CATS. I think he got a good amount of votes in that villains contest against Ansem.
Which non-Noble Nine member has the highest average number of votes across all their contest matches (minimum 10 contest matches)? (Dante | Master Chief | Aeris | Yoshi | Yuna) As dumb as it is, I feel like it's Master Chief. He always chokes close matches and resists SFF, so I think he rarely has ultra low votals. Plus he sucked in the recent contests, meaning he didn't get many matches in 2013 and 2018 where votals were low. Meanwhile, Link vs Yoshi 2004 is the type of match that would tank the others.
Which of these Pokemon characters has received the most total votes? (Charizard | Mewtwo | Red | Missingno) Think it's Mewtwo because it has 2008 that the others don't have + the whole bandwagon in 2013 against Draven where he almost made the finals. However, I wouldn't be surprised if it's Charizard since Mewtwo's 2 big contests were both 3/4-ways which split votes. Still leaning Mewtwo.
Which Noble Nine member has the least number of contest matches? (Mega Man | Sonic | Solid Snake | Crono | Mario) Crono's broken the N9 too many times.
Which "kain" has the most contest votes? (Kain (Legacy of Cain) | Kaim Argonar | Kane | Caim | Kain Highwind) No idea who most of these guys are. Going with the FFIV guy.
How many characters have received less total votes than Tanner? (0 | 4 | 11 | 28) With how depressed our votals have been, I suspect there are quite a few in 3way or 4ways. I know Chester, Spring Breeze and Caim probably have less than Tanner so probably more than 4.
Link has the most votes in contest history. Who is second? (Cloud | Solid Snake | Sephiroth | Samus) Feel like this is a trick question. Cloud's the "obvious" answer, but he got retired for a good part of it so he's definitely in less matches than the others. Whether he can overtake them in votals is another thing. Sephiroth has Villains all by himself so he should be in more matches than Cloud, but he also faces the dilemma of getting SFF/LFF by Cloud. Snake and Samus I think have been in the most amount of matches but both are weak with Samus constantly dealing witth Link/Mario SFF/LFF. I'm going to roll the dice and go with Snake.
Which franchise has the most character battle wins? (Half-Life | Fire Emblem | Portal | Mass Effect | Mother/Earthbound) GFNW so Half-Life's out. I think Ike had maybe 3 wins total and Lucina has maybe 1? Can't remember if I'm missing anyone else. Meanwhile, Portal has GLaDOS and Weighted companion cube so I think it should have maybe 3-4 wins each especially since WCC went on a run in 2008 iirc. Mass Effect is mostly Shephard and Garrus and I think it should be around 4 wins for Shepard and maybe 1 for Garrus. It's close but going with Portal.
Which perennial contest failure has received the most contest votes? (Kefka | Tidus | Magus | Donkey Kong) Honestly have no idea. Going with Tidus just because I think he's the strongest of the bunch when votals were high.
How many of the top 25 highest voted characters were developed outside of Japan? (0 | 1 | 3 | 6 | 9) L-Block is Russia. Draven is USA. Master Chief is USA. Going with 3 here.
The worst winning percentage for a contest character who has won a match is 12.5% (1-7). Who is it? (Lloyd Irving | Laharl | Ratchet | Wesker | Sam Fisher) Don't think Sam's been in 7 contests. Laharl's beaten Neku (probably only win) but has he been in 7 contests? Tales is the type of fanbase that'll get Lloyd in like 7 contests in a row and I feel like Lloyd's probably won one (and probably only one) match in his history so I'll go with him.
Which of these Metal Gear Solid characters has received the most total votes? (Big Boss | Liquid Snake | Revolver Ocelot) Big Boss is easily the strongest character now but wasn't worth a thing until 2008. Being the "best" MGS character in 2013 and 2018 means nothing with such low votals. That said, I have a hard time trusting Liquid or Ocelot either so will grudgingly go with Big Boss.
Which of these series' has had the most character battle matches? (Fire Emblem | Tales of | Xeno- | Starfox | Ace Attorney) Feels like there's a period where every contest has like 3-4 Tales characters. The issue is that none of them win matches so they don't have much second round representation. Starfox might be possible, given Fox actually wins matches but I don't think Falco or Wolf makes many contests.
Which 'sidekick' character has the most contest wins? (Knuckles | Zero | Yoshi | Vivi) Complete tossup here. Just going with Zero based on absolutely nothing.