from the Johto Region all the way to when Ash battled Morison in the Ever Grande Conference (Hoenn Pokemon League), Dragonbreath looked like a blast of green fire, but when Morison's Steelix used Dragonbreath, it looked like a silver blast of energy ( or wind)
And not to mention Dragon Rage is probably one of the only moves, that has a varied looked depending on the Pokemon
Arcanine in the Indigo Conference, it looked like a huge cyclone of water
Jame's Gyarados after he threw the Magikarp in the ocean after the SS Anne got destroyed and it evolved, is it me or when it did Dragon Rage, 3 more Gyarados appeared and they all swirled around creating a cyclone of water
Ash's Charizard: A huge swirling ball of fire
Fire Blast, when Blaine's Magmar used it, which was the first time it was seen in the whole anime, it looked like the kanji (Dai大), but when Tucker's Arcanine did it it looked like 5 blast of fire emerging from his body