Fun Fact, all the bosses in the english version have doubled health compared to the japanese version.
DIALOGUE!
MYSTERIOUSMAVERICKHUNTER
Vanishing Gungaroo: Hahahah! Destroy, destroy, destroy! Hahahah! Look at me, look at me! I'm king of the mountain!
MYSTERIOUSMAVERICKHUNTER: Stop it! Stop it right there! Do you know how hard we worked to rebuild this world?!
Vanishing Gungaroo: Aw, shaddup! Don't order me around, ya pile of scrap metal!
MYSTERIOUSMAVERICKHUNTER: Shoot... Looks like there's no choice but to fight...
It's really weird how only the secret character's dialogue actually provides reasons to fight the bosses other than 'they're MAVERICKS'. Everyone else just either taunts them or makes vague references to a past we never actually see in any detail. I'd say it was intentional, to showcase how badly Sigma's repeated uprisings have damaged human-Reploid relations, but this is Capcom, so its probably just incompetence.,