YGOPRO and DEVPRO Dueling Systems
YGOPRO is a free online dueling system made for playing Yu-Gi-Oh! duels. YGOPRO is fully automated. All card effects, life points, counters etc. are handled by the system.
Decks downloaded from this site can be imported directly into YGOPRO by dropping the .ydk file into the “deck” folder of the YGOPRO installation (C:\Program Files (x86)\YGOPro\deck).
For Android/iOS, locate the downloaded file and select copy. You then need to locate the installation files (some phones may need a file browser installed such as ES File Explorer) which is the “YGOPRO” folder and paste the downloaded .ydk file into the “Deck” folder.
Once the deck has been dropped into the right folder, simply launch YGOPRO and it will appear in your deck selection screen.
DEVPRO is an expansion on top of YGOPRO by chief programmers Ben and Buttys along with help from AccessDenied. It includes a ranked system and unranked system for whichever you want to play in. It generally has the same cards as ygopro but it varies in anime exclusive cards. It also has a chatbox and other features.
Adding decks to DEVPro is the same for YGOPRO. Simply drop the .ydk file into the “deck” folder.