No no no no, you don't get it! it's a localization issue involving Japanese pronunciation that they kept digging in instead of announcing a mistake. Charizard was never intended to be Fire-Flying, but Fire-Frying!
Eh, they didn't consider Fiora's appearance in Shulk's Final Smash a spoiler, so I doubt they care about a two-decade old spoiler that everyone already knows. Even Sheik's character description on the official Zelda website mentions it (based on a quick translation at least).