Warning signs
One source says a red light appears before a boss fight, and treats it as a preparation signal. Use it to check your health and ammunition before you move forward.
The first boss
Community reports, which this page labels as lower support, describe the first boss in two phases. The first phase is a single enemy. In the second, smaller enemies appear. One report says those smaller enemies are fragile and should be cleared before you return to the boss. The same reports say the boss’s attacks do not change between phases.
One community report says getting hit slows your character, which can start a cycle of more hits. That report suggests switching to a firearm to finish the fight. Treat this as a player account, not a tested rule.
Shotgun and the late fights
The W-500 Shotgun is tied to the boss section after the motel, according to one source. See the shotgun page for where to find it, and the demo shotgun code page for its locker code.
The final encounter at the broadcast center is a stronger rematch of the Town Hall boss. One source says it adds no new moves. The last boss before Eddie Velvet has heavy attacks with knockback, and the source advises carrying plenty of healing.
Endings and boss handling
Some endings depend on how you handle bosses. The gam3s table says the Rest ending needs at least two of the three major bosses spared, and the Live ending needs all three spared. Check the walkthrough before a boss fight if you plan for a particular ending.
What the sources do not confirm
The full boss list and the phase-by-phase moves for each boss are not confirmed by the sources. Do not assume a boss count, a phase count or a move list from this page. For the story route that leads to each fight, see the walkthrough.