Probably the most iconic Duel Links exclusive, this card is on the limited 2 list, and STILL sees play to this day! I suppose if there's no Battle Fader...
Kiteroid
The most popular charmy, the 7th best floodgate
Mulcharmy FuwaLose 1 Turn
This good boy returns to the deck after going to the GY!
Outstanding Dog Marron
A mostly modern adaption, many know this card for it's art and memes, rather than it's strong on summon pop 2.
Grandtusk Dragon / Nutbuster Dragon
All it took for these shadow weaving fusionists to see play again was a trap that put Winda on board with ease! It's release spawned one of the worst deck names in the history of the game.
Shaddolls
It's surprising that this Volcanic anime card was not included in the decks modern wave of support. Maybe less restrictive Tearlaments Scream would be too strong?
Volcanic Wall
Solemn Warning in the hand, a Machine based 'Earthquake'
Dominus ImPulse Mines
An orange dog that looks more Rock than Aqua.
Hound of the Tistina
The most popular card to summon off Seals for a while, this level 8 Earth Dragon was an alternative to Buster Whelp
Amorphage Goliath
An archetype of gems and rocks, these colourful machines have seen some success since their new wave! And it only took double foolish, double e tele, a new gameplan, etc. etc...
Crystron
Before its upcoming print in the OCG, this GX card debuted in Duel Links, with the exact effect it hand in the anime. The same can't be said of its OCG counterpart.
Chaos Distill
Floo's favourite summon on your turn, A floodgate that is still allowed for some reason
Raiza the Mega MonArchnemesis Protos
A robot counterpart to man's best friend.
Mecha-Dog Marron
This Irish named Dragunity synchro saw some niche play in Dragon Link, but is a key piece in Dragunity. Just don't draw the Roc!
Dragunity Knight - Gae Dearg
This long and drawn out combo deck is known for its loops and specific 2 card combo. It's recent support then gave it 1 card lines. Thank GOD they lose to every charmy!
Ritual Beast
This water support card debuting in Duel Links is actually far better than the eventual TCG creation! Though neither have ever seen relevant play.
Ice Mirror
D/D tuner needed to play through Nibiru, Plant's answer to Trap cards
D/D OrthRose Archer
Doggy Diver
After Union Carrier's ban, some Dragon Link players resorted to THIS card to Buster lock opponents.
DMZ Dragon
This deck wasn't even an 'archetype' before it's new wave. However, a fresh coat of non-once per turns, along with a perfectly timed release schedule allowed for it to see meta success!
Yubel
This warrior debuted in Duel Links with a pretty irrelevant effect. When it came time to create the card in the TCG, they kept the Duel Links effect, while adding an effect giving the card relevance in some Ninja builds. Both cards exist in Duel Links, name's unchanged.
Noble Knight's Shield-Bearer
A popular send off Fiend Griefing for trap decks, A spell card that searches Level 1's
Absolute King Back Jack-In-The-Hand
Oomf who's really into BDSM.
Chain Dog
Other than a horribly clunky FTK, this Rokket never saw any competitive success in Dragon Link piles.
Exploderokket Dragon
These fiends got a new wave that FINALLY gave them endboard pieces! But who really needs an endboard when you can loop your opponent for 4?
Dark World