No. Togekiss is Normal/Flying. the only type Dragon is effective against is Dragon.
Togekiss, because it is the evolved form and has better stats and moves.
Dragon type moves are only super effective against Dragon type Pokemon.
Dragon type Pokemon are weak against Ice, Dragon, and Fairy type moves.
Dragon type moves are not very effective against Steel types. Dragon and Ice type moves are super effective against Dragon types.
Dragon-type moves are super effective against Dragon-type Pokemon.
Flygon is a dragon and ground type its weak against ice type moves and dragon type moves.
Dragon Pokemon are weak to ice and dragon type moves, and resistant to electric, fire, grass, and water type moves (By resistant I mean that when those type moves hit a dragon Pokemon, they will only do half the damage that they normally would). (This answer only applies to pure dragon Pokemon. Extra types such as flying/dragon, will have more weaknesses and strengths.)
Dragon type moves are only strong against dragon type Pokemon.
A Dark Dragon Pokemon takes double damage from Fighting, Ice, Bug and Dragon moves.
Ice, Fairy and Dragon-typed moves are very effective against Dragon.
Kingdra is weak against dragon type moves.
Dragon type moves are only super-effective against other dragon Pokemon. However, if the dragon type move is on a dragon-type Pokemon, the move will do substantial damage to many different Pokemon. This is because, dragon-type Pokemon usually have outstanding stats which make them stronger than other Pokemon.