Is it okay for Fire-type pokemons to drink water?

[Thanatos]

For Slugma...it could prehaps drink lava?

 

[Enzap]

What about Slugma?? Wouldn't water just evaporate in its mouth before it could swallow

It would probably also harden the lava, depending on how much water there is.

I'm of the same opinion as some other people here. Pokemon that aren't literally made of fire such as Houndour or Typhlosion probably can, while Pokemon like Magmar or Slugma probably should not.

 

[Peppermint Phoenix]

All food has water so it's cool

 

[Peachy]

The more animal-like ones would be okay. I'm not sure about the ones that are pure fire.

 

[Almonds]

Well, it seems okay because I think I've seen Tepig drink water out of a bowl or something similar....