Are There Any Poison Dragon Type Pokemon?

Dragalge (Japanese: ドラミドロ Dramidoro) is a dual-type Poison/Dragon Pokémon introduced in Generation VI. It evolves from Skrelp

Skrelp

Skrelp is a brown aquatic Pokémon that resembles a common sea dragon. It has a purple face and neck, red eyes rimmed with black, a tubular, upturned snout, a leaf-like pectoral fin on either side of its head, and a large, roundish lump on top of its head.

› wiki › Skrelp_(Pokémon)

starting at level 48.

Is there a bug dragon type Pokémon?

It's strange that there hasn't been a Bug/Dragon-type Pokémon to date, considering that it would make sense for there to be a Pokémon based on a dragonfly that has draconic qualities. There is a dragonfly Pokémon in the form of Yanma and its evolution, but those are Bug/Flying-type Pokémon.

Is there a fire dragon type Pokémon?

As of this publication, Resharim is the only dragon Pokemon that is also a fire type (many assume Charizard would fit this description based on its appearance, but it is not a dragon type).