Limitations list.
Light Tyrant Fou-Lu (BoF4) - Tyrant form, no Dark Wave
Valefor Fangirl Yuna (FFX) - All non-Valefor Aeons prohibited
Penultimate Terra (FF6) - No Drain nor Ultima
Izanami 2 (P4) - Starts on Form 2
Discriminating Loki (VP) - No Indiscriminate
Frue Final Jenna Angel (DDS) - Starts on Form 3
Pre-Rogue Blue (Saga Frontier) - Pre-Rogue duel, no Rune.
Belial needs a new tailor (WA4) - No 4D Pocket.
Heavy
DeathlessEvans (BoF2) - No Death.
Decressed Lilka (WA2) - No crest modification.
Unglitched Lucian (VP) - No Shining Bolt button spam glitch.
Unholy Rosa (FF4) - No Holy.
Just Guv (DQ8) - No Call Team, no Dragon Soul.
B-Ending Yuri (SH) - No Amon, no Seraphic Radiance.
Pauper Orlandu (FFT) - No Excalibur.
Flame Champion Chris (S3) - True Fire + Phoenix runes.
White Mage Ryu (BoF3) - No Bonebreak nor Accession.
Windy Hugo (S3) - No True Fire (borrowed by Chris).
Showboat Raquel (WA4) - No basic attacks.
Middle
ALICIA JEEEENKINS (VP2) - Equipped: Dragon Rib, Bloody Patch. Begins w/ 19% max HP. No menu magic.
Bright Knight (BD) - Dark Knight, no dark-elemental attacks.
Noa w/ bad makeup (LoL) - Can't inflict charm.
Bro Tidus (FFX) - Locked to Brotherhood.
Kyra Eleison (PS4) - No healing.
Single Sword Hiro (L2) - No Triple Sword.
Lonely Reyva (SN) - No Summons / Rooms / etc.
Decloaked Poo (EB) - No Cloak of Kings.
Rune Walsh, proper magician (PS4) - Equipped w/ staff.
Human Millenia (G2) - No Valmar skills.
Asleep Johnny Garland (SH3) - No Ether Purge / Purgatory stuff.
Light
Red-Eyed Dragoon Dart (LoD) - Fire Dragoon [no Divine Dragoon].
Odoryuk Yulie (WA4) - No Heal or Hi-Heal.
Izanagi Fanboy Yu Nakurami (P4) - Locked to Izanagi Persona.
Magicless Marle (CT) - No starred / Spekkio spells.
Meme Sabin (FF6) -
https://youtu.be/2u84cH_bmTA?t=21sStraight & Narrow Aika (SoA) - No Swirlmarang.
Busted Cloud (FF7) - Locked to Buster Sword.
Democratic Caineghis (FE10) - No free Formshift (e.g. like Giffca), no starting gauge, no items.
Selfish Clarissa (WAXF) - No Sacrifice.
Limiter Elly (XG) - No Dream Rod, no Hyper Deathblows.
ElfChallenge Arnaud (WA4) - Locked initial equipment, no Slow Down
Waterbottle Gobi (BoF1) - Always underwater, no basic attacks.
Puny
"I quit. -Whim" Lily (MK2) - Basic attacks only.
Struggling Mew (Pokemon) - Moveset: [Substitute, Bulk Up, Barrier, Roost]. Use Gen4/5/6.
SuperBlackAielWizard (FF1DoS) - No attack magic / enemy status
Grounded Ulki (FE10) - No starting gauge, no items.
Magical Kongol (LoD) - Magic only. Starts w/ 500 SP.
1v1mebro Soren (FE9) - Locked to Daggers.
Quiet Qristo (DQ4) - Auto-Silenced.