Pretty could be said in many ways, including the following:
-Bonito (masculine) or bonita (feminine)
-lindo (masculine) or linda (feminine)
-guapo ( boy) or guapa (girl)
bonita
bonita
You can say "Eres bonita".
You can say "Ella es bonita".
mujer bonita
There is no direct translation for "pretty please". Simply say "Por Favor" (please).
You would say "guapa pero gorda".
You can say "Ella es muy bonita".
You say it pretty much the same way you say it in English: xenofobia.
usted no es bonito
un bebe guapo/a
me gusta verme bonita
eres una chica bonita