- Recommended Boss order
Overcome the Bosses in the following order with the indicated attack:

Blade Man (use Commando Bomb)
Solar Man (use Water Shield)
Nitro Man (use Chill Spike)
Pump Man (use Electric Wool)
Chill Man (use Solar Blaze)
Sheep Man (use Mega Buster)
Commando Man (use Wheel Cutter)
Strike Man (use Triple Blade)

- Hard mode
Successfully complete the game on the Normal difficulty to unlock the Hard difficulty.

- Challenges
Successfully complete the indicated task in Story mode to unlock the corresponding challenge in Challenge mode:

Block Devil N	Reach Block Devil on the Normal difficulty.
Chill N	Reach Chill Man on the Normal difficulty.
Wily Machine H	Reach Wily Machine on the Hard difficulty.
Strike N	Reach Strike Man on the Normal difficulty.
W Archive E	Reach the first Wily Archive on the Easy difficulty.
Wily Capsule E	Reach Wily Capsule on the Easy difficulty.
W Archive N	Reach the first Wily Archive on the Normal difficulty.
Sheep E	Reach Sheep Man on the Easy difficulty.
The Keeper H	Reach The Keeper Man (Strike Man Stage) on the Hard difficulty.
Block Devil H	Reach Block Devil on the Hard difficulty.
Chill H	Reach Chill Man on the Hard difficulty.
Crab Puncher H	Reach Crab Puncher on the Hard difficulty.
Commando N	Reach Commando Man on the Normal difficulty.
Nitro E	Reach Nitro Man on the Easy difficulty.
Wily Capsule N	Reach Wily Capsule on the Normal difficulty.
Nitro H	Reach Nitro Man on the Hard difficulty.
W Archive H	Reach the first Wily Archive on the Hard difficulty.
Crab Puncher N	Reach Crab Puncher on the Normal difficulty.
Blade H	Reach Blade Man on the Hard difficulty.
Pump E	Reach Pump Man on the Easy difficulty.
Blade N	Reach Blade Man on the Normal difficulty.
Solar E	Reach Solar Man on the Easy difficulty.
Pump H	Reach Pump Man on the Hard difficulty.
Solar H	Reach Solar Man on the Hard difficulty.
Wily Capsule H	Reach Wily Capsule on the Hard difficulty.
Commando E	Reach Commando Man on the Easy difficulty.
Strike E	Reach Strike Man on the Easy difficulty.
Commando H	Reach Commando Man on the Hard difficulty.
Suzak and Fenix H	Reach Suzak and Fenix (Solar Man Stage) on the Hard difficulty.
Pump N	Reach Pump Man on the Normal difficulty.
Sheep H	Reach Sheep Man on the Hard difficulty.
Block Devil E	Reach Block Devil on the Easy difficulty.
TriCastle H	Reach TriCastle (Blade Man Stage) on the Hard difficulty.
Blade E	Reach Blade Man on the Easy difficulty.
Crab Puncher E	Reach Crab Puncher on the Easy difficulty.
Solar N	Reach Solar Man on the Normal difficulty.
Octobulb H	Reach Octobulb (Sheep Man stage) on the Hard difficulty.
Chill E	Reach Chill Man on the Easy difficulty.
Nitro N	Reach Nitro Man on the Normal difficulty.
Sheep N	Reach Sheep Man on the Normal difficulty.
Strike H	Reach Strike Man on the Hard difficulty.
Wily Machine E	Reach Wily Machine on the Easy difficulty.
Wily Machine N	Reach Wily Machine on the Normal difficulty.

- Challenge options
Successfully complete the indicated task to unlock the corresponding type of challenge in Challenge mode:

Hard Boss challenges	Reach the Boss on the Hard difficulty.
Normal Boss challenges	Reach the Boss on the Normal difficulty.
Easy Mini Boss challenges	Reach the Mini Boss on the Easy or Normal difficulty.
Easy Boss challenges	Reach the Boss on the Easy difficulty.
Normal Mini Boss challenges	Reach the Mini Boss on the Normal difficulty.
Hard Mini Boss challenges	Reach the Mini Boss on the Hard difficulty.

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