151 slim booster box S-Chinese Vol.1 "Journey" and Rare cards in the expansion also comes in two Reverse Holofoil variants Collect 151 Surprise Slim Booster

Its a stretch to say Pokmon simply took Digimons idea on this one

Toph, the First MetalbenderToph, the First Metalbender | Art by Eilene Cherie | Fire Lord AzulaFire Lord Azula | Art by Fahmi Fauzi | Fire Lord ZukoFire Lord Zuko | Art by Jo Cordisco | Avatar AangAvatar Aang | Art by Fahmi Fauzi | Iroh, Grand LotusIroh, Grand Lotus | Art by Fahmi Fauzi Hey nerds

I think there are two reasons: Using Waterfall instead of Horn Attack leads to the same result

Grade standout SIR/IR cards now while theyre affordable

That is where staples prove their value

First, it's a three cost, with an ETB ability so you can drop it on the third turn