What's the adjective for stylisation? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs style, stylize and stylise which may be used as adjectives within certain contexts.
“Suddenly, the red velvet curtain across the stage parted to reveal a rather plain woman in a styleless blue dress.”
“It is clearly still 30 July 1966 inside your head, the first and last time the English rode their styleless blood-and-thunder brand of soccer to a World Cup title.”
“He appeared to be nothing more than a nondescriptly handsome wodge of heteronormative generica, tidily styleless in a sweater and chinos, but his dopily enthused expression was so innocuous it was unnerving.”