Games like Clunky Hero
Games like Clunky Hero include Hollow Knight, Afterimage, Thank Goodness You're Here!, Momodora: Reverie Under The Moonlight, and Prince of Persia The Lost Crown. We matched them by the tags players give Clunky Hero on Steam (Metroidvania, Funny, 2D Platformer, Hack and Slash, and Comedy): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Platformer · Souls-like

Afterimage
Shared: Metroidvania · 2D Platformer · Side Scroller

Thank Goodness You're Here!
Shared: Funny · Comedy · 2D Platformer

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

Prince of Persia The Lost Crown
Shared: Metroidvania · 2D Platformer · Exploration

UnEpic
Shared: Metroidvania · Comedy · Platformer

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

Blasphemous 2
Shared: Metroidvania · 2D Platformer · Hack and Slash

Hollow Knight: Silksong
Shared: Metroidvania · Platformer · Souls-like

Frontier Hunter: Erza’s Wheel of Fortune
Shared: Metroidvania · 2D Platformer · Side Scroller

Anomaly Agent
Shared: 2D Platformer · Hack and Slash · Side Scroller

Pizza Tower
Shared: 2D Platformer · Funny · Platformer

Rogue Legacy 2
Shared: Metroidvania · Platformer · Arcade

BattleBlock Theater®
Shared: Funny · Comedy · Platformer

Dead Cells
Shared: Metroidvania · Hack and Slash · Adventure

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

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

Bloodstained: Ritual of the Night
Shared: Metroidvania · Side Scroller · Platformer

Touhou Luna Nights
Shared: Metroidvania · Side Scroller · Platformer

SHINOBI: Art of Vengeance
Shared: 2D Platformer · Metroidvania · Platformer

Have a Nice Death
Shared: Hack and Slash · Funny · 2D Platformer

South Park™: The Stick of Truth™
Shared: Funny · Comedy · RPG

Guacamelee! Gold Edition
Shared: Metroidvania · Platformer · Comedy

DLC Quest
Shared: Platformer · Comedy · Funny