I don't know why everyone is freaking out about using NPC characters. It's really simple to use NPC characters, stages and NPC cards, you don't even need a tool specifically to do that. You just need little effort and some basic Cheat Engine knowledge. It's possible on both PC and smartphones.
Konami's strategy is simple. * Add a new box with an OP card. * Wait. * Limit the card so that the deck becomes uselsess. * Add a new box with another OP card. * Wait. * Limit the card. * Add new Op card... *goes on*
Still need Demise. 50% of your life and less ATK. Judgment's advantage is having a decent chance of fulfilling its condition with Green Grass. The problem is you also need to reliably draw the card before you mill it.
Those characters are in game, they just aren't being used. Their renders and textures are there but they lack voices. He didn't create a single thing there, just loaded them.
You're more than welcome. I just figured the uploader wouldn't respond to you as they like to think only they can use mods. If you feel like using any of the mods in the video, it's pretty easy to set it up as Duel Links is a very simple game and really easy to mod.
![JUDGMENT DRAGON arrives! [Yu-Gi-Oh! DuelLinks]](/img/logo.svg){kind=logo}
