Kong

Kong was a rather infamous creator associated with the Infinity Mugen Team. He ripped a large amount of sprite packs, and has made over 70 characters in the span of only a few years, with all of them having highly challenging AIs (which can be configured).

Many of his characters have garnered a negative reputation among the community due to their slew of bugs and incredibly unforgiving, nigh-impossible AIs. For example, this YouTube video showcases the author's conversion of Omega Red managing to defeat an older version of Rare Akuma. (No, for real)

Cyberbots characters

 * Blodia
 * Jackal
 * Tarantula
 * Gaits
 * Killerbee
 * Super-8
 * Warlock
 * Fordy
 * Guldin
 * Helion
 * Lightning
 * Reptos
 * Riot
 * Swordsman
 * Vise

Marvel VS Capcom characters

 * Anakaris
 * Gambit
 * Juggernaut
 * M. Bison
 * Magneto
 * Mega Man
 * Omega Red
 * Roll
 * Sentinel
 * Servbot
 * Spiral
 * Storm
 * Strider Hiryu
 * Venom
 * Amingo
 * Captain America
 * Blackheart
 * Cable
 * Cammy
 * Colossus
 * Dr. Doom
 * Hulk
 * Iceman
 * Iron Man
 * Marrow
 * Psylocke
 * Rogue
 * Sabretooth
 * Silver Samurai
 * Sonson
 * Spiderman
 * Thanos
 * Tron Bonne
 * War Machine
 * Wolverine
 * Wolverine (Bone Claw

Pocket Fighter characters

 * Pocket Akuma
 * Pocket Dan
 * Pocket Ibuki
 * Pocket Ken
 * Pocket Lei-Lei
 * Pocket Ryu
 * Pocket Sakura
 * Pocket Tessa
 * Pocket Chun Li
 * Pocket Felicia
 * Pocket Zangief
 * Pocket Morrigan

Red Earth characters

 * Blade
 * Kongou
 * Ravange

Other characters

 * Donovan
 * Gill
 * Jedah
 * Ibuki
 * Oro