Ho-oh, Mr. Mime, Mime Jr., Porygon2, Porygon-Z, Flabébé, Nidoran♀, Nidoran♂, Zygarde 10%, Zygarde 50%, Oricorio Pa'u, Oricorio Pom-Pom, Type: Null, Jangmo-o, Hakamo-o, and Kommo-o all have characters not of the alphabet.
So, we have a period (.), a number (2), a hyphen/dash (-), an accent over the e (é, don't know what to call it), a percent symbol (%), an apostrophe ('), a colon (:), and the male/female symbols (♀/♂).
Source: Scrolling through the Pokédex