Sunny, you're supposed to offer a random pokemon for someone else to nickname as well. Buuuut, you didn't so I guess I'll give my own Moltres idea:
SUPER ULTRA CHICKEN KEBAB.
...Failing that, I suggest abbreviating it into : S.U.C.K.
....Well, that was a rude acronym. So really, I'd say:
Kebab.
Aaaaanyway, Tangrow got a beauticious Castform! Give nickname to Castform?