Meiling is thankful for: the invention of cornbread, her adopted family of Eevees and 'eons, her pal Vega, her psychic powers, and of course, for being alive and healthy n.n
Fireball is thankful for: her big huge family, which includes her immediate family, Redrum's family, and her trainer's family, and her trainer's other pokemon which also count as family.
Iceberg is thankful for: fish. And seafood. And that's about it because she's not all that good at thinking in the first place.