Character/Class Switching/Transformation

Pankapu

4 out of 5. Pankapu is an underrated linear platformer with a gorgeous dreamlike atmosphere and some Metroidvania elements to enjoy. Technically incomplete, but the story vagueness may be a feature.

Mech Chip

3 out of 5. A Mini-Metroidvania that plays by its own rules, offering a unique and satisfying experience. Excellent level design and fun bosses to blow to pieces, with a variety of gimmicks to boot.

Ghost 1.0

3 out of 5. Emphasis on Wave-Based challenge rooms and robot possession puzzles add a unique twist to the Metroidvania explorative format. Story seems cringe at first, but it really grew on me.