Subject: Yes, Trubbish is a Pokémon.
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Posted on: 2017-01-21 10:12:00 UTC
It was introduced in Generation V to complete the pollution trio of Koffing (who is helping an airborne sea mine with a silly grin) and Grimer (a sentient blob of pestilential ooze who, in Hawaii, has taken to eating lots of mustard). Both of those are from Gen I. =]