Games like Princess Pomu and the 5 Moons
Games like Princess Pomu and the 5 Moons include Blasphemous, Hollow Knight: Silksong, Skul: The Hero Slayer, CARRION, and Hollow Knight. We matched them by the tags players give Princess Pomu and the 5 Moons on Steam (Metroidvania, Action, Pixel Graphics, Female Protagonist, and Fantasy): closest matches first, and among equally close ones the better-known games.

Blasphemous
Shared: Metroidvania · Pixel Graphics · Violent

Hollow Knight: Silksong
Shared: Metroidvania · Indie · Female Protagonist

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Indie

CARRION
Shared: Metroidvania · Pixel Graphics · Action

Hollow Knight
Shared: Metroidvania · Platformer · Indie

Iconoclasts
Shared: Metroidvania · Pixel Graphics · Action

Rogue Legacy
Shared: Action · Metroidvania · Platformer

Dust: An Elysian Tail
Shared: Action · Metroidvania · Platformer

Record of Lodoss War-Deedlit in Wonder Labyrinth-
Shared: Metroidvania · Female Protagonist · Pixel Graphics

Bloodstained: Curse of the Moon
Shared: Action · Pixel Graphics · Metroidvania

Momodora: Moonlit Farewell
Shared: Metroidvania · Pixel Graphics · Female Protagonist

Katana ZERO
Shared: Action · Pixel Graphics · Platformer

Gato Roboto
Shared: Metroidvania · Action · Pixel Graphics

Blasphemous 2
Shared: Metroidvania · Fantasy · Pixel Graphics

Axiom Verge
Shared: Metroidvania · Pixel Graphics · Action

Ori and the Will of the Wisps
Shared: Metroidvania · Action · Platformer

Hotline Miami
Shared: Action · Pixel Graphics · Violent

Rabi-Ribi
Shared: Metroidvania · Female Protagonist · Pixel Graphics

Gensokyo Night Festival
Shared: Action · Metroidvania · Pixel Graphics

Celeste
Shared: Pixel Graphics · Indie · Female Protagonist

Owlboy
Shared: Pixel Graphics · Metroidvania · Indie

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · Pixel Graphics · Female Protagonist

Shantae: Risky's Revenge - Director's Cut
Shared: Metroidvania · Female Protagonist · Pixel Graphics

The Messenger
Shared: Metroidvania · Pixel Graphics · Platformer