Games like PoopSentai
Games like PoopSentai include SANABI, Shovel Knight: Treasure Trove, Broforce, Gravity Circuit, and Sonic Mania. We matched them by the tags players give PoopSentai on Steam (Side Scroller, Action, 2D Platformer, Beat 'em up, and Adventure): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: Action · 2D Platformer · Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · Action · Pixel Graphics

Broforce
Shared: Action · Pixel Graphics · Platformer

Gravity Circuit
Shared: Action · Platformer · 2D Platformer

Sonic Mania
Shared: Platformer · 2D · Action

NINJA GAIDEN: Ragebound
Shared: Action · 2D Platformer · Side Scroller

Sonic Origins
Shared: Action · 2D Platformer · Adventure

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · 2D

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer

Blasphemous 2
Shared: Side Scroller · Adventure · 2D Platformer

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Side Scroller · Beat 'em up · Pixel Graphics

Axiom Verge 2
Shared: Action · Adventure · 2D Platformer

Katana ZERO
Shared: Action · 2D Platformer · Platformer

The Messenger
Shared: Platformer · Action · Pixel Graphics

Gal Guardians: Demon Purge
Shared: Action · 2D Platformer · Side Scroller

Bloodstained: Curse of the Moon
Shared: Action · Side Scroller · Platformer

Freedom Planet 2
Shared: Side Scroller · Platformer · Action-Adventure

BlazBlue Entropy Effect
Shared: Action · 2D · Platformer

Smilemo
Shared: Action · Adventure · 2D Platformer

Celeste
Shared: 2D Platformer · Platformer · Pixel Graphics

Prince of Persia The Lost Crown
Shared: 2D Platformer · Action · Side Scroller

Blade Assault
Shared: Action · 2D Platformer · Platformer

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

Azure Striker GUNVOLT 3
Shared: Action · 2D Platformer · Side Scroller