Theres a good chance this card will see play in Legacy, Pioneer, and Commander at least
eBay is a great place to shop Pokmon cards, both Japanese and English cards, and you can often find graded cards available for purchase on eBay too
Insert Token Combining all of the key ingredients of a token deck from generators, doublers, to payoffs, enables you to overwhelm your foes easily
Your options are: Champions Helm Lightning Greaves Sword of Body and Mind Sword of Feast and Famine Sword of Fire and Ice Sword of Light and Shadow Sword of War and Peace The Mirran swords are clearly the best here, though the other two have their uses since they both grant a flat protection with hexproof and shroud
The Illustrator card gets its own section because, while it is the single most famous Pikachu card in existence, it was never printed in a Japanese booster pack and sits in a different category entirely