Tamatoa, Happy as a Clam is also just a strong card in general for allowing you to get items directly from your discard back into your hand and play them for free when he quests
And then you have a healthy dose of interesting cards without any of the set mechanics
Its 80 HP is somewhat low, but this can be improved using Giant Cape or Rocky Helmet
5-cost Marco isnt the worst, hes a blocker that can be tough to remove from the field
I wouldn't jam this into any generic Red deck as we have better sources of card advantage now (what a time to be alive!) and the damage dealt isn't going to be anything too crazy unless we have an opponent holding 15+ cards in hand
But the Neo era sets introduced Shining cards, which represented Shiny versions of Pokmon for the first time in the TCG (Shiny Pokmon feature alternate colorations and were also introduced in Generation Two, Gold and Silver , of the mainline Pokmon games)