The Lusamine/Nihilego fusion could be an interesting two phase boss where you first had to fight her Pokemon team before taking her on.
The first phase of the fight has you fighting her Pokemon, one at a time. Lusamine watches the battle from the background, sending out another Pokemon every time you defeat the previous one.
Her Pokemon act like K.O.able Assist Trophies, they move around, have two to three attacks and need to be hit a certain amount of times to be defeated. You fight them in the following order:
-
Clefable is the easiest one, its only moves are
Moonblast( similar to Mewtwo’s Shadow Ball but without the darkness damage) and
Metronome(effects taken directly from Togepi’s Poke Ball, including darkening the battlefield, giving you the Flower status and causing an earthquake)
-
Lilligant can be a tricky little thing, it can damage you with
Petal Dance if you’re up close, and can temporarily stun you with
Stun Spore.
-
Mismagius can disappear into the ground and pop out from below you with
Shadow Sneak(similar to one of Marx’s attacks but smaller) and burn you with
Mystic Fire(similar to Charizard’s Flamethrower but bigger)
-
Milotic is when things get more difficult. its
Hydro Pump can damage you in addition to pushing you(eat your heart out Kyogre), it can swing its tail at you if you’re close enough with
Aqua Tail(comparable to Rayquaza’s tail whip attack from Brawl) and can summon blasts of water from the ground with
Waterfall.
-
Bewear is the last mon you face before Lusamine, it can rush at you while flailing its arms around with
Flail, can uppercut you with
Hammer Arm(taken directly from its Poke Ball summon) and can grab you and try to "hug" you to death with
Bind(shake the control stick to escape).
After all her Pokemon are defeated, Lusamine gets furious and decides to take you head on. At this point, phase two begins. She can now be damaged, but the insane mother/parasitic alien fusion have some nasty tricks up her sleeves.
-She’ll try to crush you by slamming her tentacles at you multiple times with
Pound.
-She’ll levitate rocks off the ground and throw them at you with
Ancient Power.
-She’ll drench the floor with poisonous gunk that damages you with
Venom Drench.
-She’ll summon pointed rock from the ground to impale you with
Stealth Rock.
-And finally, when her health is low, she’ll violently swing her tentacles around in a desperation attack that replaces her Pound:
Brutal Swing.