Sightseer remains one of the most famous Trainer cards ever released in Japan
You can also use it as a way to create treasure tokens for synergy reasons or to play a 3-drop ahead of the curve
I've got a few extra bits and pieces to deal with organization, bulk, and color coding in my setup as well (more on that below), but if you're starting out as cheap as you can, you only really need the first two items on this list
So let's take a look at the cards you need for 'Mythical Island Tale of Adventure': Mythical Slab #65 (Two Diamond) Budding Expeditioner #66 (Two Diamond) Mew ex #83 (Rainbow / Two Gold Star) Celebi ex #85 (Immersive / Three Gold Stars) Rewards: Celebi Emblem
People generally feel, if they had a chance to compete in the game, or to at least break up the combo, it's OK
In the English games, it is called Rare Candy