It depends.
If it is your first, then lvl 36.
If it's your second, like mine, then it's lvl 34
it evolves at level 36
Shiny Stone
lvl 36
lvl 20
level 18
It evolves at level thirty.
You can't catch a Charmander in Pokemon Platnium, but someone can trade you a Charmander egg or a Charmander and you may evolve it to Charmeleon then Charizard.
A yellow Floatzel of course
trade to make the evolving start
You must evolve it from the grass starter.
16
get a munchlax and evolve it you get munchlaxes at the honey trees