Yoku Block training and accompanying boss room.

Difficulty Select:

Easy: Bass - Go right on First Screen, have double jump, yoku blocks spawn 2 tiles wide, and in simple orders. A short stage.

Normal: Megaman - Go down ladder, and go Right on Lower Screen. Gather keys, and deal with traditional Yoku block patterns. Avoid spikes, lasers, and face Yoku Block themed mini-boss Doggo. Longer stage length than Easy.

Kaizo: Protoman - Go down ladder, and go Left on Lower Screen. Use, or avoid using Bullet Reflecting shield, and Time Slow, as needed to destroy, or avoid destroying dust blocks. Difficult Yoku block patterns, keys, spikes, pits, ranged enemies, lasers, trap secrets. Longer stage length than Easy.

Yoku Boss Room: Bubble Man, navigate Yoku Blocks above damaging lasers, while trying to land shots on Bubble Man who is protected by spikes.