With rulers from across Equestria gathered for diplomatic reasons, an up and coming overlord seizes his opportunity. Shame he doesn't know the summoned creatures, he might've taken personalities into account.
The hippogriff symbolizes triumph over impossibility and existence of unconditional love. Here's hoping that same logic holds up now, while trying to save another.
Radio Wave escapes being caught by shapeshifting into a royal guard. Conveniently as a series of events involving royalty and certain characters are about to unfold.