Games like Mangavania
Games like Mangavania include Hollow Knight, Momodora: Reverie Under The Moonlight, Öoo, Ori and the Will of the Wisps, and Hollow Knight: Silksong. We matched them by the tags players give Mangavania on Steam (Metroidvania, 2D Platformer, Archery, Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Platformer · 2D

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · 2D Platformer · 2D

Öoo
Shared: Metroidvania · 2D Platformer · 2D

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

Hollow Knight: Silksong
Shared: Metroidvania · 2D · Platformer

The Messenger
Shared: Metroidvania · Platformer · 2D

Lost Ruins
Shared: Metroidvania · Platformer · Cute

Dust: An Elysian Tail
Shared: Metroidvania · Platformer · 2D

Webbed
Shared: 2D Platformer · Cute · 2D

Celeste
Shared: 2D Platformer · Platformer · 2D

Gato Roboto
Shared: Metroidvania · 2D · Platformer

Dead Cells
Shared: Metroidvania · 2D · Platformer

Nine Sols
Shared: Metroidvania · Platformer · 2D

Owlboy
Shared: Metroidvania · Platformer · 2D

Blasphemous
Shared: Metroidvania · 2D · Platformer

SANABI
Shared: 2D Platformer · 2D · Action

Skul: The Hero Slayer
Shared: 2D · Metroidvania · Platformer

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Super Meat Boy
Shared: Platformer · 2D Platformer · 2D

Rain World
Shared: Platformer · 2D · 2D Platformer

F.I.S.T.: Forged In Shadow Torch
Shared: Metroidvania · Platformer · 2D Platformer

Shantae and the Seven Sirens
Shared: Metroidvania · Platformer · 2D

Rogue Legacy 2
Shared: Metroidvania · Platformer · Action

Afterimage
Shared: Metroidvania · 2D Platformer · Platformer