After beating Urien, Mega Man gets the Aegis Reflector. To help demonstrate, Dan throws a Shinkuu Gadoken which travels so slowly that Mega Man has to put up a second Reflector because the first one runs out, and Dan rolls away long before the reflected attack reaches him.
The fight against Balrog ends with him falling into a pit and dying.
Blanka's weapon is firing watermelons, meaning that somebody on the Street Fighter roster is weak against watermelons. It's Rose.