Goblin Rider?Follow

Ok, so I'm in Jugner, killing a Walking Tree I came across when behind the tree I see a goblin on a chocobo. Then this goblin begins to speak:

Goblin Rider: Need more cards.
Goblin Rider: Where next one?
Goblin Rider: No more goodies 'round here!
Goblin Rider: Me go looks somwheres else.

All the while, he had the chocobo digging. Then, I began to notice points entitled "Overturned soil" clicking on one, I was told the following:

Xanoxonax digs up 1 strange trading card and places it in the treasure pool.
Xanoxonax obtained: Hotei Card

Meanwhile, the goblin is still riding around talking to itself, this time saying:

Goblin Rider: Need more cards
Goblin Rider: Need more cards
Goblin Rider: We no lose to smelly Moogles this time.

I came upon another overturned soil and got another Hotei Card. Since they are Rare/Ex, I immediately lost it, since I already had one. Another overturned soil spawned a Wayward Worm, which conned "Impossible to gauge". It cast Bind on me and then disappeared. Eventually I found another overturned soil, this time receiving a ********** Card, which is also Rare/Ex.

They are described as Tenshodo trading cards. I attempted to trade the Hotei card to the Goblin Rider, but nothing happened. I headed off to Jeuno and went to the Tenshodo, but talking to the NPCs there revealed nothing.

Does anyone know what this is all about?

A goblin on a choco?!??! I sincerely hope this isn't a joke because that sounds so cool. :D

They are also handing out belts with Enchantment:Costume on them! The thread I linked in my other post is continously being updated ^^