Mario & Luigi - Bowser's Inside Story {Final Boss} Dark Bowser (NO DAMAGE + Challenge Medal)

► Playlist with all bosses: goo.gl/qWgKwV
Battle starts at 02:53
I wish you didn't have to watch the entire damn cutscene every time you want to retry, it gets really tiresome after failing the first ten times.
With Challenge Medal on this becomes a real final boss, Dark Bowser packs some powerful attacks and if you get really careless he will pummel Bowser into dreamland with three to four attacks or even less.
Fawful as the Dark Star Core is no pushover either he can KO both bros. with two attacks even with the best armor on and that arrow thing after the spinning pendulum attack? Massive damage one-hit kill if it hits.
Also, I didn't know you could swing Bowser by ducking with "Y" in the cage at the time I recorded this. But, heh.
The thing here is that you can't end this fight as quickly as you could without Challenge Medal so this fight becomes really dangerous and you really need to know how to dodge every incoming attack.
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About Challenge Medal:
Challenge Medal accessory is an accessory that gives a 50% increase for HP, DEF, SPEED and Coins earned, and a 150% increase for POW.
The earliest you can get it is after beating Cholesteroad's Green Shell challenge as soon as you defeat Scutlet and restore Bowser's flames.
In short: it is the "Hard Mode with perks" for this game.