Growlithe will be level 13. Zubat is only available as an ultra common in caves.

Growlithe is a lazy lump of a pokémon who loves nothing more than to be fed poképuffs all day and to lounge in the sun. When asked to do anything, it will look meaningfully at the person or mon, then present its belly as a means to pacify them and make them forget that they wanted it to do something. The overall effectiveness of this tactic is mixed.