no imports ever

Monsters

Abyss Actor - Twinkle Littlestar
Cyberse Accelerator
Code Talker
Creator of Hope
Creator of Miracles
Crystal Protector
Crystal Vanguard
D/D/D Flame High King Genghis
D/D/D Super Doom King Purplish Armageddon
D/D/D Supersight King Zero Maxwell
Disdainful Bird of Paradise
Divine Serpent Geh
Edge Imp Cotton Eater
Fire Opalhead
Flower Cardian Moonflower
Fluffal Patchwork
Gandora Giga Rays the Dragon of Destruction
Gouki Destroy Ogre
Holachtie
Junk Collector
Legendary Shadow of the Six Samurai
Link Disciple
Linklebell
Magi Magi Magician Gal
Mudragon of the Swamp
Number 29: Mannequin Cat
Number F0: Utopic Future - Future Slash
Odd-Eyes Revolution Dragon
Odd-Eyes Wing Dragon
Old Entity Chthugha
Outer Entity Azzathoth
Outer Entity Nyarla
Performapal Card Gardna
Performapal Gold Fang
Performapal Handsome Liger
Performapal Lebellman
Performapal Odd-Eyes Metal Claw
Predaplant Dragostapelia
Raidraptor - Arsenal Falcon
Raidraptor - Revolution Falcon - Airraid
Red Rising Dragon
Reloader Dragon
Security Dragon
Shuttleroid
Stardust Assault Warrior
Subterror Guru
Summon Sorceress
Superheavy Samurai Daihachi
Superheavy Samurai Swordmaster Musashi
Tin Musical Battlemech
Trickstar Bloody Mary
V-LAN Hydra
White Aura Biphamet
White Stingray

Also all those super old vanillas, and anything from Link VRAINS not named Electrum or Needlefiber

Spells
Forbidden Trapezohedron
Frightfur Patchwork
Nanana
Ostinato
Over the Rainbow
Predaplast
Speedrift
Winning Formula
Yosenju's Divine Mountain Winds

Traps
Crystal Hoard
The Phantom Knights of Mist Claws
Scramble Egg