Peter Pan and Tinker Bell, Mufasa and Simba, and Elsa and Let It Go
Luffy Red Parallel Leader (Collector/Rare Editions in top grade) Why its huge: Leader cards resonate with set identity and deck-building
It's also only a Stage One, meaning you can get to it relatively quickly
As such, Al Bhed Salvagers is a helpful addition to many different builds
The Umbreon VMAX Alternate Art (often called "Moonbreon") from Evolving Skies, for example, became one of the most valuable modern Pokmon cards, with prices exceeding $500 at its peak
It also packs a punch with its solid 3/2 stats for only 2 mana, allowing you to pressure your opponents when you arent using it for its main abilities