As you scan the pokémon, it emits a cloud of gas around it. However, it doesn't seem to have noticed you, and just seems to be a natural occurrence for the pokémon, which after a few moments, your pokédex identifies as a Koffing.
The puffball seems overjoyed as it eats the food you prepared for it. It really seemed to enjoy it.
SpoilerTraining Validated. Possibly on hold for a bit while the two encounters are cleaned up.