Costumes - Sly Cooper: Thieves in Time Guide - IGN

In Thieves in Time, Sly Cooper is able to wear costumes, similar to the disguises from Sly 3. However, in Sly 3 you had to do a button pressing combo each time

Getting Stronger, Sly Cooper Wiki

Sly Cooper - Sly Cooper: Thieves in Time Guide - IGN

Sly Cooper: Thieves in Time - IGN

El Jefe - Sly Cooper: Thieves in Time Guide - IGN

Costumes, Sly Cooper Wiki

Sly Cooper and the Thievius Raccoonus, Sly Cooper Wiki

All Rolled Up - Sly Cooper: Thieves in Time Guide - IGN

Ultimate Sly, Sly Cooper Wiki

Sly Cooper: Thieves in Time Trophy Guide •

Sly Cooper: Thieves in Time #11 - The Best Costume

Replying to @diegomarazita I think Sly 3 would have been the best

Sly Cooper: Thieves In Time 'Costume' trailer - Gematsu

I was livestreaming Sly 2 again but this time it's the HD

Sly Cooper: Thieves in Time - IGN

Sly Cooper - Thieves-In Time (IGN Prime - Wiki Guide PDF