That card is obviously super-strong, but imagine if it was not a Supporter, and thats exactly what Gust of Wind is making it an exceedingly powerful Trainer card from the TCGs first set
True bulk is the stuff worth fractions of a penny
However, once the emperor disappeared, the Court fell into chaos
Post-board they have some sweepers, but those are definitely beatable
Whichever two types are combined will offset any weaknesses one may have if the other resists it
More serious collectors, or people not interested in the advent calendar experience, are probably better off picking up a different Pokemon product of similar value, like an elite trainer box, which affords more opportunities to pull secret rare cards.