Live video of stage 1 boss being bullied by other stage bosses.
That's the thing, Daiyousei isn't even a Stage 1 boss. She's a Stage 2 midboss. She doesn't even have a name or any dialogue - she's just called 'large fairy' because that's all we can really call her.
... Yamame and Wriggle are both Stage 1 bosses, though. (But Yamame is also a rare-type. Though Daiyousei is even rarer than Wriggle...)